My cat Sydney (RB) tried this out about one year ago. He didn't mind the change; but I surely DID NOT LIKE IT!! While scooping out the "poop" and clumps, I couldn't stand the awful smell . The stuff also stuck to his paws ; several times I slipped whan stepping on those crystals, and once I really hit the ground...!
I will never ever buy this stuff again; it is too expensive, and surely less effective than the litter we use now("Compact Ultra" by Vitakraft) !
Let us know about your experiences with this!