At first I thought the Bobsweep was amazing.  It would go around and pick up all the fur with my only part in the vacuuming was emptying the collection container.  I was reinserting the collection tray one time and a small piece broke off so it would no longer stay closed without a piece of tape.  I should have requested a new one but about the same time it stopped picking up as well so it didn't seem work the trouble.  It worked really well at first and then over time, it stops picking up as well, just like every other vacuum I've ever owned.  It might be because of the dog fur and I tried cleaning the brushes and clearing the path to the collection container.  I can't see anything that is not working correctly, it just no longer picks up like it did in the beginning.  I think I used it for about six months before it stopped picking up.