It's a headache if your cats aren't skittish
I got the litter robot 5, my cats have no fear around it but that means that they want to mess with it every time it cycles. If they look in, it stops moving. This means that they can then jump in and pee right into the grating that holds the good litter while emptying. This means that I am still scooping but it is much harder than normal litter box scooping. There is no way for the robot to keep cycling when they look in and only stop if they get in, which they probably wouldn't if it was moving, but since it stops they wait a little bit and then jump in. This also means that it allows them to dig around in the waste bin part beneath and pull out poops. It also lets them keep it open as long as they want so it stinks up the room. Even when it isn't moving and the cats aren't around, it occasionally lets out a terrible smell like gas builds up in the waste bin and then gets released. I have the better filter add on but I don't think these emissions go out that direction. The motor is very weak, using the recommended clay litter you can hear it whine as it struggles to cycle. It eventually stopped being able to cycle (about 2 months in) so I switched to a lighter litter but that doesn't have enough weight to fall so I have to help scrape but at least poops get emptied on the normal clean cycles.