We have had ours almost a year now and it has been the best investment we have ever made in our cats. When we bought we had one cat and now we have 2 kittens and our one cat. They love it so much they wait for it to run before the next one gets in. I set it to clean 10 minutes instead of 30, so they won't have to wait as long. Our house doesn't smell like a litterbox. The pellets are a bummer and end up everywhere in our house so adding more rugs to help confine the mess to the immediate area. Plan on buying one for my brother and his wife.