Roomba Combo j7+ Robot Vacuum & Mop

3.8

(16)

Bottom Line

Choose if you want top-tier obstacle avoidance plus a retractable mop that keeps rugs safe; Skip if you need a self-washing/refilling dock or truly deep scrubbing. Great vacuuming is the upside; loud auto-empty and manual mop care are the tradeoffs.

Best for

Homes with mixed hard floors and rugs that need dependable obstacle avoidance (cords, pet mess risk) and want vacuuming plus light, regular mopping without worrying about wet carpets.

Not for

Anyone who wants hands-free mopping (pad washing/drying and tank refills), very quiet auto-emptying, or consistently fast, LiDAR-style navigation efficiency in cluttered or complex layouts.

Verdict

The Roomba Combo j7+ is consistently described as a vacuum-first hybrid: strong pickup on both hard floors and carpet, plus standout small-object avoidance and a retractable mop that keeps rugs from getting damp. The app, mapping, and zone control are usually excellent, but camera-based routing can take longer than LiDAR rivals and a few reviewers report navigation or hardware hiccups. Mopping works best for routine shine and light spills rather than aggressive, scrubby stain removal, and the dock does not wash pads or refill the tank. Auto-emptying is convenient but notably loud.

Pros

Mop lifting system 4.8 ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 7 reviews 4.8

Retractable mop lifting system is repeatedly cited as best-in-class for protecting rugs: the pad fully stows on top rather than hovering close to carpet, reducing drips and cross-contamination concerns.
Hard Floor — Fine Dust Pickup 4.7 ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 3 reviews 4.7

Fine dust pickup on hard floors is generally strong in everyday cleaning, contributing to a noticeably cleaner baseline between deep cleans.
Obstacle Avoidance (Robot) 4.4 ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 13 reviews 4.4

Obstacle avoidance is a core strength: consistently strong on cords and common clutter, with pet-waste avoidance highlighted; not perfect, as some odd items (mugs, drapes, tiny toys, straps) can still be pushed or snagged.
Assembly and Setup 4.4 ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 3 reviews 4.4

Setup is usually described as straightforward with guided app onboarding and mapping runs; mapping can take more than one pass and may be slower than LiDAR-based bots in initial setup.
Accessories & Tools 4.4 ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 4.4

Included accessories commonly noted: extra filters/side brushes, mop pads, and cleaning solution samples; overall kit is seen as complete for getting started.
Build quality & durability 4.4 ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 4.4

Build quality is commonly described as sturdy and well-finished, with thoughtful design touches; long-term durability perceptions vary mostly with software/navigation reliability rather than physical wear.
Noise level 4.4 ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 4.4

During cleaning, noise is commonly described as moderate to fairly quiet for a robot vacuum, especially on carpet; the main noise complaint centers on the dock, not the robot itself.
AI, Smart & App / Automation 4.3 ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 9 reviews 4.3

Strong smart feature set: scheduling, room/zone routines, recommendations, and learning-based adjustments are frequently praised; some reviewers still want finer manual controls (for example, suction) or better job-queue flexibility, and a few note occasional app quirks/crashes.
Carpet — Low-Pile Pickup 4.3 ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 2 reviews 4.3

Low-pile carpet pickup is typically strong for a Roomba, though a few tests note small misses with certain fine debris and occasional need for extra passes.
Suction & Airflow 4.3 ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 4.3

Suction/airflow performance is generally perceived as strong in day-to-day pickup (especially when paired with dual rollers), though some reviewers note it can lag high-suction competitors on heavy spillages or deep crevices.
Docking & Auto-Empty Reliability (Robot) 4.2 ★ ★ ★ ★ ★ ★ ★ ★ ★ 9 reviews 4.2

Docking and auto-empty are generally reliable and convenient, though a few reports describe occasional emptying failures or hardware issues with a unit/base; most users still find the dock a major usability upgrade.
Carpet — High-Pile Pickup 4.2 ★ ★ ★ ★ ★ ★ ★ ★ ★ 4 reviews 4.2

High-pile carpet and pet-hair pickup are frequently rated very good to excellent, though ultra-plush rugs and embedded debris may still benefit from multiple passes.
Map & Path Efficiency (Robot Vacuums) 4.0 ★ ★ ★ ★ ★ ★ ★ ★ ★ 16 reviews 4.0

Mapping and systematic coverage are often described as accurate and reliable once trained, but camera-based navigation can be less time-efficient than LiDAR in complex spaces and a minority of experiences report stalled/errored runs.
Mopping performance 3.9 ★ ★ ★ ★ ★ ★ ★ ★ ★ 11 reviews 3.9

Mopping is generally rated good for routine upkeep and light messes, leaving floors shinier; it is commonly described as less aggressive than true scrubbing systems and may need multiple passes for tougher stains.
Hard Floor — Large Debris Intake 3.9 ★ ★ ★ ★ ★ ★ ★ ★ ★ 3 reviews 3.9

Large debris intake is good for routine messes, but several reviewers note it can be overwhelmed by big, dense spillages (flour/rice/oats), sometimes pushing or scattering debris before recovering.
Ongoing ownership costs (bags, filters, batteries) 3.6 ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 3.6

Ongoing costs mainly come from disposable dock bags and occasional replacement brushes/filters; several reviews view bags as convenient and cleaner to handle, but they add recurring expense versus bagless docks.
Price & Value 3.5 ★ ★ ★ ★ ★ ★ ★ ★ ★ 8 reviews 3.5

Value depends heavily on sale pricing: at full MSRP it is considered premium and missing some dock automation features, but discounts can make it a compelling buy for its avoidance and carpet performance.

Cons

Battery & Charging 3.4 ★ ★ ★ ★ ★ ★ ★ ★ ★ 6 reviews 3.4

Battery feedback is mixed: some tests report long runtimes (especially in vacuum-only mode), while others describe below-average endurance for a premium bot; recharge-and-resume helps mitigate this.
Crevice / Groove Pickup (Hard Floors) 3.4 ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 3.4

Crevice and edge-line pickup is mixed: capable overall, but some tests note weaker crevice performance versus higher-suction rivals and occasional residue along rug edges.
Maintenance requirements 3.3 ★ ★ ★ ★ ★ ★ ★ ★ ★ 5 reviews 3.3

Maintenance workload is moderate: dust emptying is automated, but mop pads and water refills are manual; periodic brush/side-brush cleaning is needed, especially with long hair or heavy debris.
Hair‑Wrap / Tangle Resistance 3.3 ★ ★ ★ ★ ★ ★ ★ ★ ★ 4 reviews 3.3

Tangle resistance is generally good on the main rubber rollers versus many rivals, but long hair can still wrap (often on the side brush) and needs regular clearing.
Privacy controls 3.3 ★ ★ ★ ★ ★ ★ ★ ★ ★ 2 reviews 3.3

Privacy is periodically raised due to the front camera and cloud-based maps/images; reviewers note opt-in image review and app controls, but privacy-sensitive buyers may still be cautious.
Corner Cleaning (Robot) 3.2 ★ ★ ★ ★ ★ ★ ★ ★ 2 reviews 3.2

Corner cleaning is adequate but not class-leading; multiple reviews mention missed debris in tight corners or along awkward nooks.
Bin & Bag 3.2 ★ ★ ★ ★ ★ ★ ★ ★ 1 review 3.2

Bagged dock system is viewed as clean and allergy-friendly, with spare-bag storage noted; onboard bin/tank combo is relatively small, contributing to more frequent intervention for mopping.
Odor control 3.2 ★ ★ ★ ★ ★ ★ ★ ★ 1 review 3.2

Odor is mostly contained while the dock is closed, but some users notice a dusty smell when opening the base to swap the bag, similar to other bagged vacuums.
Water tank 3.1 ★ ★ ★ ★ ★ ★ ★ ★ 2 reviews 3.1

Water tank is considered small, often requiring frequent refills for larger homes or higher water settings; mopping remains manual-maintenance heavy compared with newer docks that refill automatically.
Dock noise 3.0 ★ ★ ★ ★ ★ ★ ★ ★ 9 reviews 3.0

Dock self-emptying noise is a consistent negative, often described as startlingly loud for a short burst, with several measurements around high-80s to around 90+ dB.
Support & Reliability 3.0 ★ ★ ★ ★ ★ ★ ★ ★ 2 reviews 3.0

Support and reliability feedback is mixed: some reports mention unit faults or navigation/app instability, while others describe consistent hands-off operation and responsive warranty handling.

FAQ

Can it mop and vacuum without wetting carpets or rugs?

Yes. Reviews consistently note the retractable mop lifts fully onto the top of the robot on carpet/rugs, making accidental damp carpets far less likely than lift-a-few-mm systems.

Is the mopping strong enough for dried-on stains?

It is generally described as good for routine maintenance and light spills, but less effective than scrubbing or spinning-pad competitors for stubborn, dried-on messes.

How loud is the self-empty dock?

Multiple reviews call the auto-empty cycle very loud, with measured peaks in the high-80s to around 90+ dB range for a short burst.

Do you still need to do manual maintenance?

Yes. You will refill the water tank, clean or replace mop pads, and periodically clear hair or debris (often the side brush or rollers). The dock only handles dust emptying.

Is it good for pet homes?

Generally yes for pet hair pickup and obstacle avoidance (including pet-waste avoidance promises), but mopping remains light-duty and long hair can still require regular detangling and brush cleaning.