Expensive.

I use it only with the tiniest of kittens whom I worry will digest the clay clumping litter.
I had 4 week olds who used it for 2 weeks, they did try to eat the clay. So after using for 2 weeks, I showed them clay litter, supervised them, and eventually they got the hang of not eating it. By the time they were 7 weeks we were on the clay litter.
I would not bother with this stuff for adult cats.
Peculiar smell, sticks like crazy.

Rose