I've just started using this robot vacuum and I think it's a good product. Building a house takes a lot of time because all the rooms are open. The first time he did a good and almost complete job in the office and in the middle of the dining room, then he went into the hallway on one side, did some work in the living room and went to the master bedroom, where he finished some work. He got stuck under my bed and was exhausted trying to get out. Next time he finished all but one of the dining room, did some more hallway work and then worked hard in the living room (I closed the door to the master bedroom) but missed a few seats because he was constantly wandering around the breakfast area and kitchen. It was difficult trying to control it to return to base, so I finally picked it up and placed it on the ground in front of its base, pressed the home button again and it docked successfully. The third time I closed the door. in bedrooms with him inside, and he did fairly well in both of those areas. He was able to crawl under one of my dressers, clean it and get it out, another he went all the way, came back and did a better job with my bed this time. I haven't looked at what he's finished in the master bathroom, but I've seen signs that he's done quite well in one of the closets, but the other one didn't seem to be finished yet. Not too bad as I have no mapping skills.