I got a CatGenie in November 2012 for use in the master bathroom upstairs. The only problem I had initially was that often very small pieces of poo would get left behind and, well, baked poo is horrible! I contacted customer service and they suggested that I remove the small racheted plastic part that the sifting arm lifts up against. In doing this the sifting is a bit smoother, so a little more litter sticks and goes into the hopper, BUT it now is only rarely that small poo bits get knocked off and baked! (BTW, I only just ordered a new box of litter--after 8 months and 3 of 5 cats consistently using the CatGenie.) I am quite pleased with the Cat Genie, and since I have figured out where to place a "downstairs" CatGenie am ordering a second one. No more scooping!