I got this litter box a week ago and set it up. My cat jumped right in and used it before I even had the app connected! She had no adjustment problems at all. The smell has been controlled well, and my wife hasn't complained a single time. The only problem with this box is, it doesn't hold enough stuff. I have 1 cat, she entered the box 34 times in a week (thanks for counting!) and she filled the litter trap. I don't know if she's just a prolific producer but I was surprised to see that she filled it in a week.