The mess and the smell
I had been using cheap litter from from a value supermarket and an open litter tray for 1 adolescent cat. It wasn't too bad. Then I purchased a jumbo cat toilet from zooplus and some of this oko plus litter. Oh my god...after one use I was convinced my cat had gone to the loo on the carpet, because the smell was awful, I mean it couldn't have been any worse if he had done a poo on my lap. Granted it clumps and absorbs well, but does absolutely nothing for the smell. Perhaps my cat has more foul smelling poo than the other users, or something? Also it tracks everywhere despite having a grated catch tray at the exit of the toilet. It sticks to the paws, fur and every part of the the cat that touches it. I'm not surprised it got stuck in one user's cat's eye. My house is now a mesy smelly place. Fortunately my cat will always look to go outside to the loo before using the tray, but for a lot of people this isn't an option. My verdict..avoid and try something else.