There are many amazing specifics about this scoop free litter box. First of all you don’t have to worry about changing the box for a couple weeks; in my household. I have two cats and I change it more frequently than you would with just one cat. The refill litter pans are not that much more expensive than regular cat litter. There is one con that I’ve found with this self cleaning litter box and it is purely because of my cats. My kitten seems to like stepping on the button that makes the ‘scoop’ pusher trigger. She likes to bat at the pusher scooping the litter so she plays with the machine. I would maybe recommended putting the button on the side or on the front side to ease any cat from triggering the button. Overall it is a great investment and saves a whole lot of time!