Purchased this a couple of weeks ago and Shark AI is still developing a routine to the way it vacuums my small ranch. It is much quieter than my IRobot and does not bump into everything. Seems to pick up pretty good. I have a wool area rug in my living room that my IRobot use to be very aggressive in vacuuming, the AI is a little less aggressive and does not vacuum up too much of the fibers. Once the AI just quit working in the middle of a room and said error 26? It has not happened again. I thought maybe it did not charge properly. Last couple of vacuums the AI has done great. So far I love this little machine.