I have had this robot for about 4 months.  It cleans OK, but every time I run it, I have to respond to its cries for help at least 5 times.  The side rotating brushes seem to stop working every time it gets a few hairs in it, which happens very frequently, and it starts beeping.  It is impossible to run this unless I am right there to babysit it, which defeats the purpose of a robot vacuum.