I got this litter box to see if I could get Tobi to use it and if has worked great. I use a cheap recycled paper litter now that is sold by Petsmart in the cat litter dept. I used the purina but found it to be very expensive. I use pee pads also just to help keep the box cleaner. Tobi goes potty outside most of the time by using the bell to let us know he wants to go out and in emergencies, he goes to his litter box which works great with all the rainy weather in Florida! Litter box training is GREAT!!!