A lot of thought went into this design! The Cat Genie runs much quieter than my old Litter-Free and does not smell even when running. My cat loves the small granules and appreciates that they are completely dry at the end of the cycle thanks to the stirring action of the scoop. I took the dome off because she looked cramped inside and it seems easier for her to use now. Even given the choice of clumping litter or the Cat Genie, she chose the CG! It would be nicer if it had a clock like the Litter-Free so I could program it without waiting for the specific time I want it to run. Because I wanted it to run after I left for work, I had to wait for the weekend to set it.