I'm glad to say my cat's doing great with the LK. Before I ever received my LK.I've slowly moved up his litter box up on a 2 by 4 platform and took off the litter guard from his litter box to simulater the LK. It primed him for actually getting up on the toilet. I"m glad I did. I had the LK on the toilet the first day and he's used it just fine ever since. Additonally I've put his used litter in the discs of each new stage insted of putting new litter when switching stages. I think that's helped. I honestly don't think my cat is any smarter then most. This seems to be working great for us. I'm not making any timelines for when when he's done. I'm pretty sure I'll just know. When he's confident with a stage. I've advanced him to the next. Almost Done!