The Catgenie is expensive but worth the money. We love the fact that when we go on vaction this year this will be one less worry. I`m pleased with it so far-very clean and no litter dust throughout the upstairs of our house. Our smaller cat had some trouble adjusting to it but I continued with our old litterbox mixed with the washable granules for 1 week. I never replaced the clumping cat litter and the mix eventually became primarily granules. After removing the old litter box again there were no more problems with the younger cat going to the catgenie.