For the first couple of work of months work ok.  Then the brush broke could not just order one you had to go though warranty for one.  Took to long to find out that you had to go through that.  Now just sent it back to be repaired for not wanting to clean 20 sq ft.   Well still not working right.  So the only way to get it to do the whole house was take the smartthing off phone an run it manual and not from phone.  Paid to much for the thing for it not to be working right.