This was so awesome for 2 weeks, and I think it would be awesome if you have only 1 cat. I have 2, and they like to go in at the same time, and it makes me have to reset the sensor tells you when to clean it and also that you have to take it apart to reset. Maybe Mines is defective? Durability I give a 3.. Odor control 10... Noise 8 ..super quiet!