In concept, the ScoopFree Classic Self-Cleaning Litter Box looks like a no-doubter, home run concept in feline waste elimination containers.  If you can get through the complicated, and sometimes, unclear directions, this large innovative litter box looks like it will become a part of your cat's world.  Unfortunately, that was not the case for our cat.  We followed the directions for acclimating him to his new litter box, but he wanted nothing to do with it.  Instead, he was more interested in crunching on the blue crystallized litter pieces.  I've got to say that he was more than freaked out by the automatic raking of the crystals that takes place periodically too.  I'm bummed that this didn't work out for us because, in principle, it's a great concept.  Hopefully, it will work for your feline friend.