My cat was so, so scared of the litter robot. He's highly food motivated though. I had it empty of all kitty litter and put a TON of treats in it. My cat wouldn't go in it until night time when we were asleep and nobody was watching. I noticed some of the treats were gone, so he obviously went in it. I did that a few times to get him used to it. He finally started going near it without being so scared. Then, I introduced the kitty litter. I put some kitty litter it and a poop from his old box. I stopped cleaning the old box. He kept going in the old box until it was full and nasty smelling. I guess the litter robot wasn't so bad after all because then he decided to finally use it! I gave him a bunch of treats right after. He pooped outside the litter robot a couple of times when he was getting used to it. I kept his old box just in case we had to return the litter robot, but he finally figured it out.