I bought one about 6 weeks ago AND I LOVE IT!!!! At first my boys were a little freaked out and followed it around jumping frantically. I stopped it and put treats on top of it so they would know it was ok and wouldn't harm them. I did the "touch" command so they put their noses to it and then ate the treat. Max accidentally pushed the big button and turned it on by himself once!
Now my boys are so used to it they just lay in the living room and ignore it while I yell "watch out, it's coming!".
I haven't had any issues with mine. It will clean 1 or 2 rooms on 1 battery charge, but you normally keep it charged all day. It takes quite a while to clean a room. For example, a bedroom can take an hour to complete. But to me, it doesn't matter. I'm not vacuuming! It doesn't harm wires at all and I do feel that it gives my floors a really thorough clean. I love it and have no issues with it. Highly recommend!