I recently switched to robot vacuums. (thank god for the Revain otherwise I would never have been able to afford it) so that's what I thought when I saw it on the deal. Two robot vacuums are better than one! That may be true (or I'm just superfluous), but it's not. He got stuck on a few things (not the things you'd expect such as slightly warped floorboards), lifted almost nothing, and at one point ran around like he was "confused". I'm very happy with my other unknown brand robot vacuum but this little guy has been returned. :(