I paid way too much to find out that the motor makes a lot of noise when cleaning the box. My cat was scared of it even though the timing was set to delay the cleaning. The box takes up a lot of room and has to be plugged in so placement is limited. I also did not like that the soiled litter would stick to the bottom, break into small pieces that the comb would not catch, and often missed the receptacle. I ended up having to clean it out manually to fix the mess left behind. I would rather just scoop it the first time myself and save the hassle....and money. I gave mine to a friend and she eventually had the same complaints about the cleanliness. Her cats used it just fine without fear.