The machine isnt that better to be honest, it may self clean but doesnt always pick up the mess ,sometime doesnt get taken into the liner, and you have to spend time ,i think more time cleaning the inside, and there is always a smell ,i have gone back to my little litter which are bigger ones and using my sand and tofu they dont smell and even scooping g out is easier with a open litter try. So no I dont rate this well and the cost is too high also.