I am a huge fan of the idea of a self cleaning litter box. I have 2 cats and 3 boxes (they say you should have 1 for each cat plus 1 more) so having 1 that cuts down on scooping is great. It of course still needs to be emptied by a human, but the sifting and gathering is done for you and you just need to empty the tray. The only issue I've noticed is that sometimes the rake looks like it's going to stop in the middle and stay stuck, so it could eventually stop working. Otherwise it's pretty awesome.