I bought this for my Mom and her two HUGE older cats. They wouldn't climb into it let alone use it. After a couple days of the cats not using it ( and doing their business on the carpet... ) we went back to their original cat box. It has sat in a garage ever since.

Paid around $300 for it...

O.G. Amazon Listing: https://a.co/d/018AfFt0

Furoomate Self Cleaning Litter Box Large Capacity, Automatic Cat Litter Box Open-Top Design for Multiple Cats with Integrated Safety Protection

-Open-top Cat-Friendly Design: Furoomate open-top self-cleaning litter box is designed with your cat's comfort in mind. The spacious top allows your cat to move freely without feeling confined. Furoomate Box has bigger actual usable area than other drum-shaped litter boxes.Paired with a large capacity trash bin, it easily accommodates multiple cats, effortlessly managing litter for 3 cats over 5 days.