How to use a Japanese cat toilet

I decided to splurge a bit on a Japanese cat toilet (HK$260) since I was told that I could recuperate the costs on using less kitty litter. Dusky took quite well to it, using it properly once or twice and balancing on the rim as he always does when he takes a poop.

Cheese Puff, on the other hand, didn't really get the point:

Needless to say, we're back to using a regular square litter box now so he doesn't get confused.