Cons: smelly and messy.
This was my third litter-box attempt in 5 months.. cost $95.00 was very hopeful, again HUGE.. ok.. can work with that but it is smelly.. the clumps r stored and makes the whole think stink as they are not properly trapped for odor confinement. Poop sticks to the rake, and gets caught BEHIND the rake.. litter EVERYWHERE! noisy.. have to clean it more than my standard box. Ordered a litter robot.. lets see if thats the one