I have the robot for 10 days. 1st trial under surveillance, I loved it! I thought, "one less hassle". Unfortunately my joy was short-lived, I absolutely have to be there to switch it on because it puts in "I'm stuck and I can not free myself" all the time (when he is in the middle of the room ...). At first I thought I could not use it, or that the room was too crowded or too large, then the wipe or wrong setting (for the move is not enough, remove and replace the pad for that it can leave!) ... but ultimately I do not think! My model is perhaps sick ...