We have 6 cats in our home. We use Special Kitty and have the same success as everyone else. The surprise is that every now and then we get a box with a lot of dust in it. I don't know if it's because it's from the end of a production run or not. The first time it happen was a very unpleasant surprise, a lot of dust in my face.
It has only happened a few times but I have to wear a dust mask to deal with it. I think that if Special Kitty could take care of it, it would be as close to the perfect kitty litter that I have ever seen.