The scoop free sensitive crystal litter tray of 3 works great when you don't want to scoop the stuff out all the time by yourself. But one thing my cats made a mess with crystal litter they probably didn't like that much to their regular litter . The 3 tray crystals worked great for me about scoop free . But I had mess to clean up off the floor. I guess you can good for me but not really that good for me. Because how my cats react to the crystal litter trays.