I also got the one with the bubble--I didn't want mine peeing down the outside --I also bought the optional fence--it comes with the lip extender on the bubble model, but I bought the fence because it's supposed to help reduce the kicking out of litter.
I first read this and thought it said well they like to sh*t in it and I am thinking isn't that the point
HURRAY! Most of us have realized by now that the litter robot isn't a hotel! We have a drawer half full of poop this morning. Life is on the way to being very good!
I just love (and completely understand) your enthusiasm for waking up to a drawer half full of poop. The whole Litter Robot thing couldn't have happened to a nicer person.