I have really enjoyed using the ScoopFree Self-Cleaning Litter Box, Second Generation litter system for my two cats. This is an amazing product that works so well. I'm not sure how I've lived without this product. It's so easy to assemble and set up for the cats to use. I am so impressed with how well it controls all the smells associated with a litter box. My cats have really done well using this system and I highly recommend this product to all cat owners.