This thing is a hoot. Granted, with 3 large cats the rake sometimes becomes clogged and needs a little help, but watching all 3 cats run to watch it work, look under the raising panel, swat at the rake is hysterically funny. Just make sure you use the recommended litter. I found the corn product made my house smell like corn and the cats would not use it. The arm and hammer baking soda super scoop is better, and I use less of it than I did with the cheaper brands in catboxes. The cats appreciate the ability to always step into a clean box. A plastic 99-cent paint scraper scrapes the bottom and sides clean with no damage to the box. I have recommended this to all my friends, and will probably start to make it a gift this year.