I got the Scoop free self cleaning litter box and it works great! I had it out of the box and setup within 5 minutes. My cat wasnt scared of it, went right up and started using it. The litter box is super quiet, you can barely hear it running. The metal arms that comb the litter work well. It scoops all the litter up and puts it up under the rim out of site. There is a magnet that hooks to the litter box and lifts it up, making a pocket for the waste to be scooped to. It does keep track of the uses so you know that your cat is using it. I love how it works. It's a great product.