I bought this in January 2012 to replace our Littermaid automatic litter box.I feel this is superior to the Littermaid box I had because:- Much quieter... doesn't have the noisy engine cranking away- The waste collection has greater capacity. Our 2 cats can go a week before filling up, where Littermaid was 3-4 days- The waste removal is easier and doesn't require replacing with those flimsy overpriced plastic trays