We have rescued two cats, siblings. The male was having issues about where to pee. We figured that was why we were the fourth home for these two kitties. We tried a number of litters and then I heard a commercial about Cat Spot Litter. I liked the fact that it is environmentally safe, actually good for the environment. We like the stir in the urine part and we do not notice any odor. We keep the litter boxes in the basement, and check them every day. Our female cat only uses the Cat Spot Litter. The male cat, still has a few issues, but not often, and he chooses the Cat Spot 90% of the time, which is wonderful. He uses a dog pee pad the other times. We left the clumping litter out when we first began Cat Spot, but soon removed it as it was untouched. I am so pleased with the Cat Spot. I like that it is delivered and I like that it is not heavy to carry. I recommend this to all of my friends who have cats.