We just moved into a tiny apartment in the city and needed an closed cat litter. We have a 23lb chubby cat so we needed one with a wide opening. This worked perfectly! Read some reviews before purchasing and I would highly recommend chulking the bottom edges before use. Litter would fall in the crevices and if your cat misses the little box inside it's easy to clean. We fit a 18 gallon bin inside and there's still room!