My daughter has used it, but I don't because my cats & I don't like the scented litters (activates my asthma). I was using the Safeway brand of crystal litter blended with Unscented Arm&Hammer Scooping in half of the boxes (I keep 7 boxes for 5 cats) and the rest get Unscented JonnyCat with some crystals added. The combination works well, but the latest rage seems to be using chicken feed. I tried the Krumbles (aka Krackettes), but my cats seemed to recognize it as the hens' feed. SO, I bought some laying mash ($7.95 for 50lbs., no tax, since I have laying hens & it presumably would be for them) and made a blend of mash with some crystals (about 2 cups worth) & some unscented clumping litter & VOILA! A Big Success!
My daughter's cat does like the Crystals Blend just fine, for the record; I think that the cat is used to strong scents, though.