The PetSafe ScoopFree Self-Cleaning Litter Box is good for those that hate scooping their cats litter everyday. It was easy to set up and I like how the litter tray just slides right into it. It always starts to clean after my cat has left the litter box. I do however get some odors from the box after about a week. When the tray needs to be changed it comes out easily and I like how it has a lid for disposal. My cat also doesn't track the crystals around the house.