I left a review regarding Petmate Purrforma jumbo, it was a smelly,horrible mess. Well, I got lucky. My PetSmart told me to bring the Purrforma back and they would credit all toward a new Littermaid and supplys for it. There was even enough credit left for 2 30# bags of the Nutro dog food I use. The Puurforma is so overpriced as well as poorly designed. I had the receipt for the Puurforma from the month before. I now have my 3rd multicat Littermaid and am very happy again. While not perfect, as litter cleaning will never be perfect, these do work well for me. I have one in the laundry room, one downstairs and the other at my farm. I have yet to find a cat that will not use this box. My cats at home are all over 10 years old. At the farm they are 2 years and younger. Hope this helps.