Don’t get me wrong, this Robot is powerful and smart, but….  Still runs into things although it has been touted that it wont.  You definitely have to be proactive to clean the room before it goes out on its dust hunt.   Even small strips of paper, up to 3 inches long as well as a dried flower will clog the works up and you will have to take it apart.   Does great on cat hair!  Sometimes when i tell it to go back to the base it will ignore me and keep working.   Nice app.