Miss Kitty and I love our Tuxedo package. Miss Kitty uses the litter box so often, I was buying 40 pounds of clumping cat litter every 2 weeks! Even the bargain basement litter was costing a fortune. Not only is the Cat Genie always clean and sweet-smelling, and saving me money, the maintenance cartridge completely saves me from any fussing with the cat box at all! After a year, all we can say is "We love it!"