It comprises two pieces: A 27.5-by-19-inch rim with a built-in safety sensor and rake, and a litter tray, which comes in either disposable or reusable form. The box is simple to set up.

Even the most ardent cat people will agree that cleaning the litter box isn’t cute. It’s messy ... deposits litter directly into an attached receptacle lined with a small disposable bag. One reviewer ...