I was nervous to change litter boxes because cats tend to hate change especially with things like litter boxes. The set up was super easy and my cat was originally hesitant to get around it so I left out this box and his old one. He continued to use his old box for the rest of the day but started to use the new one more and more. Once I noticed that he was not using the old box at all I took it away and haven't looked back since! The smell is SO much better with this versus a traditional box and obviously the cleanup is a dream since it's a self cleaning box. Loving it!