The Roomba is very stable, our son fights like with him and he endures everything without wearing characters. The suction power is great, with proper care, he has drawn even a cover of a PET bottle. But you have the collector often empty, tapping out the filter and clean the bristles. He starts with an enlarging circle and then swivels around on diagonal tracks. Smaller rooms he makes really great clean in corners remains dimensionally due only about 1 cm free. It detects obstacles and drives them to just gently, he has caused no quirks with us. On smaller surveys such as bathroom rugs he comes easily and if he gets caught somewhere or something larger (socks) sucks, it reports the error and just go off. So you can really own him run without worrying.
Becomes a problem only in large spaces and at very many obstacles such as a dining area. He drives around forever and has not caught anything at the end. I think the problem is the robots in this price range have all, they have just not a brain ... now he sucks with us only every smaller rooms and the Great is cleaned with the normal vacuum cleaner, therefore a point deduction.