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Datapoint: I've used my Roborock s7 max ultra in three different households (2 houses, 1 apartment) and have had zero issues with this.

It actually was night and day compared to the $1000 equivalent roomba I had at the time. lidar is the game changer in this space, and roomba was complacent with their technology.

I've had a few issues, but they're far from useless. The issues are, e.g. a sofa has tapered legs so the end part is very low to the floor and basically invisible so the vacuum gets stuck there. I've placed a rag that stays there above the leg and nobody sees it or cares except the robot.

I have used Roborock for ~7 years and now own 3 of them (different floors/areas). Absolutely no issues.

Largely the same here; as long as do regular maintenance on them to keep them relatively clean, clean out hair and related, they just run.