My only problem with this was my ability to understand how to get it put together. Once I got it together though, it's been a dream. I love not having to scoop litter up and out everyday. I love how I don't smell stink cat waste all the time. I love not having to clean up the litter that makes its way outside the box. My cats enjoys using it, surprisingly. I'm glad it has a sensor to stop when my cats decide they can't wait for it to do its thing. Overall this is awesome.