For my cats..Haha. This is awesome because it prevents having to scoop litter, which after work is always another daunting task. My cats don't seem to be freaked out by the robotic feature. The pan to hold the litter that came with it is cardboard, and a special type of litter. They sell the refills online and if you like it, you can definitely find refills of both the pan and litter. Overall, this is a good product!