What surfaces does the Roomba j7+ work best on?

The [Roomba j](https://www.amazon.com/s?k=Roomba+j&tag=wehavethat-20)7+ sticks to hardwood, tile, and low-pile carpet, avoiding high-pile wall-to-wall carpet that bogs down lesser robots. iRobot’s strength is obstacle detection and navigation smarts, not deep-pile suction power, so the j7+ knows its limits and stays in its lane.