Several years ago, I had 4 cats inside and it was a constant headache to have to scoop every day. I tried to get my son to do it, but that was more work than just doing it myself. One day I discovered the ScoopFree Self-Cleaning litter box. It was a special advertisement, and I told my son that for Christmas we were getting two of them. We did and we loved them and we've been using them ever since. The automatic shipment of litter is also wonderful. It's convenient and much more affordable than buying it from the store.