Do not recommend for 2 cats
Purchased the EVO model which said for up to 2 cats, but I would not recommend it for more than 1 cat. My cats are a little over a year old and they "play" in the box and jump in and out when it starts to cycle. So it stops mid-cycle and I have to manually press the cycle button several times a day. Very frustrating. Plus it does not sift the litter as well as I would have liked.