The five (!) items we purchased in the past year and a half were gifts for ourselves, our parents, our brother, and some friends who took our advice. The apartment seems tidy on the outside, but he is so brilliant that it's embarrassing. He builds cards flawlessly, never forgets anything, rides exactly as we planned, rows everything, and discovers garbage everywhere. Easily programmable, it can clean itself every day with only the removal of wires and rags, if any. He doesn't waste time cleaningSee full review