I absolutely love the CatGenie!! This is the coolest thing ever & not having to scoop that horrible clay clumping litter & wash out those old litter box......whew it's like heaven!! I still have to sweep up the tracked granules from the floor, but that surely beats having to clean out those old messes litter boxes!! I had one of the electric Fresh Step Litter Boxes prior to this & that has NOTHING on this!! I wouldn't trade it for the world! All 3 of my cats took to it pretty much right away. The only one that I had a little trouble with was my oldest girl, which is understandable after using a regular ole stinky litter box for 13-1/2 years! But within the week, she was going just like my other female & male babies! The litter still gets stuck in their paws & I do have to sweep up the floor from the tracking, but that's nothing as far as I'm concerned. Thank You CatGenie for making such an awesome litter cleaner :-) I would GLADLY purchase this again & again if I had to!