I received a robo clean from costco last week and have used it 3 times. I am very happy so far as it has picked up everything. I don't have my steps in yet so I can't tell you if it will get stuck. Also - I read a lot of bad things about them failing (a fuse or something in older models) but I am hoping I got a good one. I got it from costco.com b/c of the price and return policy. Will post if it stops working or I have any issues.