This self-cleaning litter box is awesome!  With 3 cats in the house, the old litter box filled up quickly and started to smell unless it was scooped out 1-2 times a day.  This self-cleaning box does the scooping for you and you just empty the collection container once or twice a week depending on how many cats you have.  There is NO smell whatsoever! The cats seem to like it as much as I do!