I received the ScoopFree classic self-cleaning litter box and I have mixed feelings. I love the concept of a self cleaning box. The second I set it up my cat had to try it out. It didn’t automatically kick in to clean mode. I had to manually tap the button. When it finally started to clean it moved “her business” to the back of the box instead of the front. After a few uses it seems to work better. It does contain the smell very well so a definite plus there.