Incredible difference!
I tried everything including the expensive “automatic” rolling litter box system. FEH! My house stank. No matter how often the machine “spun”, smelly effluvia stuck to the walls. I could smell the machine the minute I entered the house! Now, my kitty poops in his magic crystals, I scoop and flush the goodies down the toilet, and NOTHING SMELLS! Huzzah! I’m delighted!!