Not very good
I have cats (6+) for about 10 years. I usually buy World's Best Cat Litter Multiple Cat, but it was not available so bought this.
This clumps well, actually so well that it clumps together with the plastic litter tray/floor. I have huge issues removing it - need to use water. I also broke my litter scoop trying to remove it. For poop it works well. It does not smell.
The World's best clumps fine and does not clump with the plastic.
Catsan also does not last that long.
I had worst litters so 3