The  PetSafe Scoop Free self cleaning litter box is such a benefit for me. Not having to bend to clean a litter box is wonderful. This is a self contained unit that does the work for you. Easy to set up. Just load the tray into the unit and it does all the work. When time to change, just cover that tray and dispose. Then pop in a fresh tray.
My kitties love it because they always have a fresh clean box to use, so no messy paws.
It controls odor completely, which is amazing. Especially if you have multiple cats. I am thrilled about  that.