Compare Dreame X40 Ultra Robotic Vacuum vs Eufy S2 Omni

Reviews mention a well-equipped ecosystem with included consumables (bags/cleaning tools/solution) and optional accessories like a hair-cutting roller. Add-ons can improve hair handling but can also add to ownership cost.

Included extras are solid for a flagship robot vacuum, with reviewers noting cleaning solution, fragrance modules, documentation, and extra dust bags in the box.

The S2's chassis-lift feature is repeatedly presented as a major upgrade for plush rugs, thresholds, and higher-pile carpet handling.

Design opinions are mixed: at least one reviewer says the dock looks dated or appliance-like compared with newer, more aesthetic competitors. Most other reviews focus more on function than finish.

Reviewers generally liked the modern, visible-tech design, translucent top, lighting, and premium styling, though the dock can be taller than some alternatives.

Automation is a major theme: reviewers cite advanced obstacle avoidance, dirt detection with extra passes, customizable schedules, no-go zones, and pet-focused modes. The tradeoff for all that power is a larger settings surface area, and some reviewers find the app experience less polished.

AI navigation, 3D mapping, floor-type recognition, and app controls are useful, but the deepest independent test found app customization and smart-home integration behind rivals.

Carpet and rug handling is often praised because the robot can lift the mops and, in some modes, leave mop pads at the dock to avoid wetting textiles. A dissenting note is that mop hardware can still catch on some carpet edges or that pad removal is not always automatic, so settings matter.

Area rug handling is a notable strength in several reviews, with the S2 lifting, avoiding tassels, and preventing rugs from bunching or getting pushed around.

Setup is generally described as quick, with guided app onboarding and fast mapping runs. Reviewers report it is straightforward to get from unboxing to a usable map.

Setup is consistently described as simple, with the app and base display guiding pairing, mapping, and first cleaning with little friction.

Battery life is described as long, with a large battery (often cited as 6,400mAh) and support for recharge-and-resume. Reviewers generally expect it to handle larger homes, though thorough mop routines can still take time.

Battery comments are mostly positive, but measured coverage varies sharply by suction level and real-world recharge time can be long.

The dock uses a large disposable dust bag (often cited as 3.2L), reducing how often you deal with dust. However, some reviewers note bag replacement frequency and bag pricing can vary with usage and contribute to ongoing costs.

The dustbin and bag system benefits from automatic emptying and strong dock suction, reducing hands-on bin work.

Only a few sources discuss durability directly, but the comments that do are positive, noting robust wearing parts and a generally well-built feel. No review in the file reports major structural failures.

Build quality impressions are positive, with reviewers calling the construction solid and the overall package premium.

At least one review notes noticeably strong performance on thicker or higher-pile carpet due to high suction. Keeping carpets dry is helped by vacuum-only modes, mop lifting, or leaving mop pads at the dock, but some testers still caution about mop height when crossing carpet edges.

High-pile and thick-rug handling is a split point: several reviewers praised climbing and deep cleaning, while one lab-style test found carpet agitation underwhelming versus rivals.

On low-pile carpet, multiple sources report strong pickup and good deep-clean behavior, though stubborn pet fur may require repeat passes. Overall performance is consistently above average for a robot vacuum-mop.

Low/mixed carpet pickup is usable, but independent testing found it did not clearly outperform cheaper Eufy models or the older S1 Pro in deep-clean scoring.

For embedded debris in carpet, test-driven reviews report above-average deep-clean performance and strong suction delivery. Carpet deep-clean scores are described as near the top tier of current robot vacuums.

Medium-pile carpet evidence is limited but positive, with one review citing solid medium-pile results.

A child lock is mentioned as available, helping prevent accidental starts or setting changes. It is treated as a nice-to-have safety feature rather than a core performance driver.

Child lock exists on the station controls, though one reviewer noted it can reduce the touchscreen's practical usefulness.

Hair-cutting and brush-lifting behaviors are cited as practical ways to prevent gunk and tangles, especially when the robot encounters wet patches. Reviewers generally frame these as helpful for keeping the cleaning path cleaner and reducing manual cleanup.

Cyclonic separation and filter cleanliness are strong recurring themes, with reviewers finding suction stayed strong and filters avoided clogging.

In comparisons, the X40 Ultra is often positioned as a top performer, earning high marks for vacuuming, mopping, and obstacle avoidance versus other flagships. A few reviewers note that the very best competitors are close, so the final choice can come down to price and preferred features.

Comparisons are mixed: the S2 improves on some Eufy weaknesses and beats some rivals in specific tests, but other flagships remain stronger for carpet, mopping feel, or value.

The app offers deep controls (maps, zones, schedules, no-go lines, and automation toggles), and many reviewers find it powerful. A recurring downside is UI complexity: some call it clunky or overwhelming until you tune settings.

The app and station controls are generally easy to use, with clean navigation and touchscreen controls, but advanced customization is not class-leading.

Corner cleaning is repeatedly praised thanks to an extendable side brush and edge-focused routines. Reviewers describe better corner reach than robots that rely on a fixed brush setup.

Corner cleaning benefits from an extending side brush, though independent tests suggest the robot can still leave perimeter gaps depending on the run.

Groove and crevice evidence is positive for cracks but mixed for grout, where one test removed only part of the residue.

Cyclone performance is one of the clearest strengths: multiple reviewers praised multi-cyclone separation for maintaining airflow and keeping filters cleaner.

Some reviews highlight a dirty-water sensing approach that can trigger extra mop-pad washing or a second cleaning pass when the system detects heavier soil. This feature is presented as a meaningful upgrade for messier kitchens and high-traffic areas.

Dirty-water sensing evidence comes mainly from the dock's intelligent dirt detection, which can trigger additional washing or cleaning when water is dirty.

Docking and auto-empty are generally described as reliable, with a full-service station that empties dust and maintains the mops. One review flags weaker auto-empty suction and higher bag usage than expected, so performance may vary by debris load and settings.

The dock is a major strength, handling auto-emptying, mop washing, drying, refilling, and hair-heavy debris with few clog complaints.

Dried-on mess performance is a standout: multiple reviews describe the spinning mop system and extra-pass behaviors as excellent on sticky or dried spills (such as coffee). It is frequently positioned as among the best moppers in its class.

Dried-on stain removal is usually good for normal household stains, though heavy grout or extreme dried-mud testing is less certain.

Ease of use is generally high once set up, with strong automation and helpful app guidance. The main usability complaint is that the app and feature set can feel complex at first.

Everyday use is easy, with scheduling, automatic routines, and low-touch maintenance repeatedly mentioned as benefits.

Edge and baseboard cleaning is a consistent strength thanks to an extending mop pad and edge-reaching behaviors. Multiple reviewers highlight noticeably better along-the-wall pickup compared with robots that cannot extend to edges.

Edge and baseboard mopping is mixed: some reviewers liked the extending roller, while the most critical tester found visible wall gaps.

Edge-following accuracy is one of the weaker areas, with independent testing saying it rides too far from walls and sometimes avoids edges inconsistently.

Dust containment and filtration are strong, with filters repeatedly staying clean after weeks of use and cyclonic separation keeping fine dust away from airflow.

One test-focused review notes that after cleaning wet spills the floor was not left overly damp, suggesting good water control. In general, the spinning mop system aims to clean effectively without soaking floors.

The floorhead design stands out for its wide roller mop, extending mop head, and dual-brush anti-tangle layout.

Hard floors can look clean and shiny after mopping, though this evidence comes from one strong hands-on review.

Fresh wet-mess pickup evidence is positive in tomato sauce testing, where the robot picked up the mess without smearing.

Hair-removal channel behavior is positive overall: reviewers reported no tangles and center-channel hair removal working as intended.

Carpet hair pickup gets conflicting feedback: some coverage labels it a top option for homes with pets, but at least one lab-style test found only average fur removal in a single run. Multiple passes, higher suction, and the right brush can matter here.

Hair pickup on carpets is strong when the priority is hair management, even if carpet agitation is not always class-leading.

Hair pickup on hard floors is mixed: some reviewers call it excellent for pet hair, while at least one test-focused review found it left a meaningful amount behind without multiple passes. Expect best results with tuned settings and the right brush configuration.

Hard-floor hair pickup appears strong, with reviewers finding minimal buildup on the roller after cleaning.

Tangle resistance is also mixed: long hair can still wrap around the main roller in some reports, but anti-tangle side-brush design and optional hair-cutting rollers are described as effective upgrades. Cleaning hair out is generally considered manageable.

Hair-wrap resistance is one of the strongest consensus wins, especially for long-hair and pet households.

Hard-floor fine debris pickup is described as excellent, with test-style reviews reporting near-perfect results on materials like sand. It is regularly characterized as thorough on hard surfaces.

Fine dust pickup on hard floors is strong, including cocoa powder and fine-particle references, with no visible residue in several tests.

Large-debris pickup on hard floors is generally strong, with high percentages reported in testing and good real-world pickup. A minor recurring note is that a single pass can miss a few crumbs, which is solvable with extra passes or higher settings.

Large debris intake is strong on hard floors and mixed surfaces, with reviewers citing immediate pickup and good handling of cereal-like debris.

Lighting evidence is limited but positive, with one reviewer noting a light for dark areas and tight spaces.

A heated mop-wash is repeatedly mentioned, with hot water used in the dock to clean mop pads and the washboard. Reviewers connect the heating to better mop-pad cleanliness and reduced odor.

The station's heating functions are strong, with hot-water mop washing and hot-air drying repeatedly called out.

Innovation shows up in features like leaving mop pads at the dock, lifting brushes when sensing liquid, edge-extending mops and brushes, camera-assisted stain attention, and sensor-driven re-cleaning. Reviewers frequently call these capabilities differentiators versus simpler robot vacuum-mops.

Reviewers treated the S2 as innovative thanks to the fragrance system, cyclonic airflow, roller mop, and award/first-look attention.

Kid-friendliness is supported mainly by chemical-free sanitizing and cleaner floors for children or pets, not by child-specific controls beyond lockout.

Large debris handling is generally strong, with cereal, candy, and heavier debris picked up well in multiple tests.

Low-profile performance is positive for the robot body, which can fit under beds or tighter furniture better than some taller models.

Maintenance is described as low day-to-day because the dock empties dust and washes and dries mop pads automatically. Owners still need to refill clean water, empty dirty water, replace bags, and occasionally wipe sensors and check brushes.

Maintenance needs are low overall thanks to the dock, cyclonic filter, and anti-tangle brush, though roller-tray buildup and tank rinsing still matter.

Maneuverability is generally smooth, with one reviewer praising movement quality and another noting mapping/path quirks around obstacles.

Navigation and mapping are repeatedly described as top-tier, with fast mapping and strong coverage efficiency. Some testers note occasional pattern quirks, but overall it is seen as reliable at completing whole-home cleans.

Mapping is fast and detailed, but path efficiency is not perfect in obstacle-heavy testing.

The mop system can lift during carpet detection and, in some workflows, leave mop pads at the dock to keep rugs dry. Most reviewers view this as a major advantage, though one notes the lift height may still snag on some carpet edges.

The mop-lift system is a major strength, with 28 mm lift and carpet avoidance repeatedly mentioned, though one review wished for a mop cover.

Mopping is widely rated as a top-tier strength, driven by spinning pads, edge extension, and options for extra passes on dirtier areas. Some reviewers caution that the most aggressive automated modes can be overkill on delicate finishes until tuned.

Mopping is one of the best-supported strengths, especially on hard floors, visible stains, and everyday LVP/tile cleaning.

Noise is acceptable on lower settings but becomes noticeably loud at maximum suction, which some reviewers frame as the cost of stronger vacuuming. One lab-style test measured it as louder than average, and reviewers recommend scheduling loud runs when you are out.

Noise is a drawback: reviewers measured or noticed above-average sound, especially on maximum suction.

Obstacle avoidance is one of the most consistently celebrated strengths, with multiple sources citing camera and structured-light sensing and near-perfect avoidance results. Cables can still be a challenge for any robot, but overall confidence is high.

Obstacle avoidance is useful but not flawless; some reviewers saw excellent avoidance, while independent testing found everyday clutter still gets pushed.

Odor control is generally praised because the dock both hot-washes and hot-dries the mop pads, reducing musty smells. This is repeatedly mentioned as helpful for keeping the system from getting funky between cleanings.

Odor control is polarizing: the dock sanitation and fragrance can help, but some reviewers found the scent too weak to matter.

Running costs come up as a concern in some coverage, mainly around disposable dust bags and other consumables. Reviewers recommend factoring consumables into ownership cost, even if day-to-day maintenance is low.

Overall cleaning convenience is high because the dock, mapping, self-cleaning mop, and scheduled operation reduce hands-on work.

Longevity evidence is positive, centered on sustained suction, clean filters, and claims/tests showing no quick performance drop.

Overall sentiment is strongly positive, with several sources ranking it at or near the top among flagship robot vacuum-mops. The most common reservations are the high price, the size of the dock, and mixed reports on pet-hair pickup consistency.

Overall opinion is favorable but nuanced: most reviewers praised the S2, while the strongest independent review framed it as specialized rather than universal.

Packaging evidence is brief but positive, with one reviewer saying everything was well packed.

Pet-oriented features are a highlight: reviewers mention pet zones, avoidance of bowls and toys, and camera-based monitoring (including two-way video in some coverage). Performance with pet hair is more mixed, but overall the feature set is considered very pet-friendly.

Pet-readiness is supported indirectly through hair management, pet waste avoidance, pet hair pickup, and odor/sanitation features.

Price is the most consistent negative: several reviews describe it as a premium, top-of-the-market model. Many still consider the performance and automation strong enough to justify it for the right home, especially when discounted, but value is weaker for budget shoppers.

Price and value are the clearest caveats: several reviews noted the high $1,599.99-class price and questioned value versus cheaper or competing models.

Privacy evidence is limited but positive for buyers who dislike camera-style monitoring, since one reviewer noted there is no video monitoring mode.

Runtime is adequate but context-dependent; coverage can be large on low suction and much lower on max suction.

Sanitizing claims are tied mainly to the dock washing mop pads with very hot water (often stated around 158F). Reviews treat this as a hygiene win for the mop pads, not a guarantee of disinfecting the entire floor.

Sanitizing performance is widely emphasized, especially electrolyzed or ozonated water and claimed 99% to 99.99% bacteria/pathogen reduction.

The dock self-cleans and maintains the mopping system by washing pads and the washboard and drying with hot air, often with scrapers and repeat-clean logic. This is repeatedly credited for reducing hands-on upkeep and improving hygiene.

Self-cleaning is a core strength: the roller cleans in real time and the dock washes, dries, and prepares the mop after runs.

Software support evidence is positive but early, with one pre-production reviewer seeing frequent firmware fixes.

The solution system is frequently mentioned but described differently across sources: it can wash pads with detergent and, in some coverage, dispense floor-cleaning fluid. At least one reviewer notes detergent may be used mainly for mop-pad washing rather than being mixed into the floor water by default.

The liquid system is advanced, with auto detergent, clean/dirty water handling, and electrolyzed water.

Multiple reviewers call out the dock as large and space-consuming, even if the footprint is described as relatively slim in one write-up. Plan for a dedicated spot, especially if you are in a small apartment.

Storage footprint is mixed: the station is narrow or compact to some reviewers, but taller and more wall-space-hungry to another.

Residue and streak control depends on settings: reviewers mention choosing mopping direction or dialing back aggressive modes to avoid over-mopping certain finishes. When configured, most describe clean results without problematic streaking.

Streaking and residue performance is strong in most hard-floor tests, with reviewers repeatedly reporting no visible streaks, residue, or smearing.

Reviewers report good stuck resistance, including handling taller thresholds (often cited around 22mm) and completing coverage without frequent rescues. As with most robots, extreme clutter can still cause interruptions, but it is rated highly here.

Stuck resistance is positive on thresholds, rugs, and obstacles, though not every obstacle-avoidance test was flawless.

Across reviewers, suction is repeatedly described as flagship-level, with strong debris pickup on both hard floors and carpets. Several sources cite 12,000Pa suction and top-tier vacuuming results, though max power can be loud and auto-empty strength at the dock is not praised by everyone.

Suction and airflow are major strengths, with 30,000 Pa, 100 air watts, and sustained airflow repeatedly highlighted.

Heavy-duty suitability is good but not absolute; it can tackle demanding rugs and heavy use, but sustained max boost and deep shag can still be caveats.

Support and reliability are mixed: firmware updates were active, but a preorder recall and short warranty caveat reduce confidence.

Under-furniture performance is frequently highlighted, especially around the base of cabinets and appliances where hair and debris collect. Extendable side reach behaviors help it pull debris from areas many robots miss.

Under-furniture pickup is positive, with reviewers saying it fits under most furniture and cleaned under beds that prior robots missed.

Value-for-money is mixed: the S2 is premium and capable, but reviewers questioned whether it justifies its price over Eufy's cheaper models or other flagships.

Versatility is strong across vacuuming, mopping, carpet adaptation, hard floors, thresholds, schedules, and multi-room cleaning.

The system relies on clean and dirty water tanks in the dock and an internal water tank in the robot, which keeps mopping more automated than vacuum-only robots. Expect periodic refills and dirty-water emptying, and some coverage mentions a future-leaning option for auto fill and drain via plumbing.

Water tank usability is mostly good, with clear clean-water visibility and large reservoirs, though dirty tanks can develop odor without rinsing.