Compare 3i S10 Ultra Robot Vacuum and Mop vs Eufy S2 Omni

Included extras like the cleaning solution, carbon rod, and small cleaning tools are useful, though not a major differentiator beyond supporting dock and mop upkeep.

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.

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

AI-driven features like DirtScan-style dirt detection, automation, and voice assistants are repeatedly praised, though smart-home integrations can be limited for room-specific commands on some platforms.

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.

One review reports occasional debris spitting when transitioning between surfaces, suggesting blowback can happen in edge-case scenarios.

It detects rugs, boosts suction, and typically manages transitions well, with several reviewers noting rugs look cleaner after runs.

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 straightforward with quick mapping, but a few reviewers note the instructions and onboarding could be clearer.

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

Consumable tracking is inconsistent across reviews: some report missing or unclear bag-full prompts, while others say the robot explicitly alerts when the dust bag needs changing.

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

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

Build is consistently described as solid and premium, though that sturdiness comes with extra weight.

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

High-pile carpet performance is the weakest area in comparative testing, where deep pickup can fall well behind the best-in-class models.

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.

Low-pile carpet results are generally good for everyday debris, though some tests still show small leftovers like scattered grains.

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.

On carpets, it tends to do well with surface debris and hair, yet deep-cleaning embedded grit can be below average compared with the best competitors.

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

Child-lock controls are present and highlighted as useful for preventing accidental starts or setting changes.

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

Reviewers frequently note it handles big crumbs without clogging, and the roller/mop system stays surprisingly clear during normal use.

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

Versus other flagships, it stands out for water recycling and strong hard-floor cleaning, but it can lag on carpet deep-clean tests and has mixed object-avoidance scores depending on the review.

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 is widely considered capable with maps, zones, schedules, and even remote viewing, but opinions split on polish: some call it smooth and user-friendly while others report clunkiness or missing advanced controls.

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

Some reviews highlight built-in cable management guidance and generally smooth navigation around furniture, but real-world cord avoidance still depends on the obstacle system, which is inconsistent.

Corner results are mixed: some reviewers see improvement, while others note the side brush and geometry do not always reach tight corners as well as the best robots.

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

At least one lab-style review rates groove and crevice pickup below average versus competitors, suggesting it may miss debris in deeper floor cracks.

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.

Green-light style illumination and dirt-detection features are repeatedly mentioned as helpful for seeing and targeting fine debris.

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 station automation is usually reliable for charging, washing, drying, and emptying, but a few reviewers cite slower drying, louder operation, or occasional quirks that still require check-ins.

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

Dock noise varies by mode: auto-emptying and the water system can be loud for some users, while others still describe the overall system as quieter than expected.

Roller-mop scrubbing is strong on sauces and everyday grime, but very dried stains, grout lines, and textured tile can still need extra passes or manual spot cleaning.

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

Most reviewers describe a set-and-forget experience once configured, with routines that reduce hands-on cleaning, tempered mainly by the physical size and weight of the base.

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

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

Edge cleaning benefits from the extending roller mop, but accurate edge-following depends on navigation precision, which some tests say is not always perfect.

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

Auto-emptying usually keeps mess contained, but experiences vary on how completely it clears the onboard bin and whether the system clearly tracks consumables like bags and solution.

Water capture and distillation can significantly increase energy use versus typical mop docks, with one comparison measuring markedly higher kWh for a full mop-and-dry cycle.

Filtration is presented as HEPA-class and effective for normal dust control, with the app providing some consumable tracking, though not all reviewers saw clear replacement prompts.

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

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.

Hair pickup on carpets is generally strong, especially for pet hair, though overall carpet cleaning depth still varies by floor type.

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

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

Anti-tangle performance is often praised and can be near-perfect for typical pet hair, but long human hair can still wrap in some tests and auto-detangling is not always foolproof.

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

Hard-floor fine dust performance is consistently rated high, with tests showing strong pickup in fewer passes than many rivals.

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 a standout, with multiple reviews describing it as crumb-devouring and resistant to clogs.

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.

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

WaterRecycle is the clear innovation: capturing humidity and distilling dirty water removes a major pain point of mop docks and is repeatedly cited as the reason to buy this model.

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.

Clearance requirements are relatively high due to the top sensor bump, so it is not the best option for very low furniture.

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

Day-to-day upkeep is low thanks to the dock, but owners should expect periodic cleaning of filters and trays plus regular consumable replacements for bags, solution, and wear parts.

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.

Mapping is a consistent strength with fast, accurate room maps and efficient routes; a few tests note slightly imprecise edge positioning during mopping.

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

Mop lifting on carpets and rugs is generally effective and helps prevent wetting, with most reviewers reporting reliable transitions.

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 a core strength: the roller mop applies pressure, cleans itself continuously, and performs very well on everyday messes, though it can be slower and less ideal on grout or rough surfaces.

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

The robot itself is often described as quiet, but the dock can be noticeably louder during auto-emptying and when the water-capture/distillation system is running.

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

Obstacle avoidance is the most polarized attribute: some reviews call it excellent with cords and clutter, while at least one comparison shows serious failures with pet waste and certain cables.

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

Odor experiences vary: some notice a smell from the cleaning solution or station during cycles, while others report neutral results aided by deodorizing modules.

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

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, driven by hands-free mopping and hard-floor pickup, with recurring caveats about carpet deep cleaning, base size/noise, power draw, and obstacle avoidance variability.

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

Packaging is often described as oversized and heavy but protective, reflecting the large dock and accessories.

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

Pet owners generally like the hair pickup and hands-free routines, but pet-mess avoidance is inconsistent and at least one comparison test showed it can run over rubber dog poop.

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

It is priced like a flagship; many reviewers say the value hinges on how much you care about the WaterRecycle convenience, and it looks most compelling when discounted.

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.

Camera-based remote viewing is available but usually requires an intentional setup step, and reviewers note there is no true offline mode, so privacy-minded users may want to disable camera features.

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.

Several reviews repeat sanitizing or sterilization claims tied to distilled water and the dock process; real-world feedback is generally positive but not deeply validated with measurement.

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

The dock delivers a largely automated wash, squeegee, and dry routine for the roller mop, but it still benefits from occasional manual cleaning of filters, trays, and catch points.

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

Feature longevity is a question mark in a few reviews, with specific concern raised about ongoing software support if the model is discontinued or replaced.

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

Automatic solution dosing is convenient, but it relies on proprietary cleaner, and some reviewers dislike the ongoing cost or lack of flexible water-only options.

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

Multiple reviewers call the all-in-one base large and space-hungry, so it needs a dedicated spot and is less friendly for tight homes.

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

Most users see clean, low-streak results, but thick or chunky spills can smear, and some reviewers notice streaking or residue on textured tile or during mop-lift transitions.

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

Most reviewers report it rarely gets stuck in typical rooms, but threshold climbing is limited and a failure case appears when it ingests soft rubber messes that can jam the brush.

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

Across reviews, suction feels strong for day-to-day pickup, especially on hard floors, but deep carpet extraction is more variable and can trail top flagships in lab-style tests.

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.

Several reviews call it overkill for apartments or very small homes because the base is large and the feature set is aimed at higher-end, hands-free upkeep.

Most reports suggest stable daily operation, but at least one review flags concerns about long-term support if the model is being phased out.

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

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 headline feature is the self-refilling system that condenses humidity and distills dirty mop water so you may rarely add or dump water in humid homes; performance can drop in drier climates where water generation is slower.

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

Both the robot and especially the dock are heavy, making the system inconvenient to move between floors or relocate.