Robot vacuums · iRobot
Owners keep the J9 for its strong carpet vacuuming and its knack for getting under counters and around clutter, and accept a hit-and-miss mop and a slow app to get that.
Carpet is where it earns its place: owners with rugs and fully carpeted floors say the dual rollers pull dirt out effectively even though the advertised suction is lower than rivals. Several call it the best part of the machine outright.
The app is the clear complaint: owners say it is sluggish and takes a long time to do anything, and some feel iRobot lags other brands in how the software has developed.
Pick up to three. You get a page with just those, side by side, on the subjects owners raised.
What keeps people happy after the first weeks is the vacuuming. On carpet it does the job well, and owners like that it slips under low furniture, counters and curtains where other robots will not go, and that the camera-based obstacle avoidance keeps it out of trouble with clutter. A few single it out as the machine that let them stop worrying about the visible floor and under-furniture space altogether. The longer runtime and the fact that one robot can mop the bathrooms as well as vacuum come up as the practical reasons some owners chose it over the S9.
The mop is where owners are divided. Some are satisfied with the pad and simply run two passes on uneven wood floors; others say it mostly wets the floor rather than cleaning it, and that it leaves streaks unless they use plain water. Hair is also divided: households with several dogs find the rollers clog at the ends, and some have swapped in the older flap-style roller to cope, while others found the weekly mop swap and hair handling workable enough to keep it. Navigation without lidar draws mixed reports, and the app is something most people simply learn to wait on.
The accounts that touch on reliability lean negative. Reported problems include the robot turning in circles until the battery ran out with no firmware change to explain it, slow charging from empty to full even after iRobot replaced parts, and roller ends that clog repeatedly with pet hair. Battery life is a divided topic rather than a clear fault, with some owners fine with the runtime and others not. Owners who stay with it tend to fix things themselves: replacing rollers, buying alternative roller designs, and adjusting cleaning routines. Support experiences are split roughly down the middle, with some getting parts replaced and others left waiting.
Long-term accounts are thin. Only a handful of owners speak from several years of use, and one of those ran the machine from 2021 to 2025 before replacing it with another brand. There is not enough here to say how a J9 typically holds up past year two, or what usually fails first, so treat the reliability picture as early rather than settled.
Nothing with a clear majority yet. Owners who raised these subjects were split, or too few to judge.
Nothing has a clear majority against it yet. Counted from the owners who raised each subject, not from everyone. A subject is judged once at least 4 owners raise it.
The same owner, asked again at each point. Fills in as owners answer.
More in robot vacuums: Neato D7, Neato D8, Ecovacs X1.
Counted from public accounts by people who said they own it, and summarised by Still Kicks in its own words. Not a manufacturer claim, a lab test or an estimate.
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