I definitely have mixed feelings about this litter box. While it's nice that it automatically scoops after each use and creates a more pleasant and clean area for the cat, it truly does not reduce odor much and I end up removing fecal matter from the pan every day to avoid odor. The disposable trays are wasteful and expensive and take up quite a bit of room in the garbage. According to the information included with the trays, they should last 20-30 days for one cat. However, the litter is urine soaked and dwindles down to a thin layer after about two weeks. I have one healthy young cat and it's completely necessary to change the litter every two weeks, making this litter box one of the most expensive options long-term since you can only use crystal litter with it. I purchased a reusable pan for this unit since it seemed so wasteful to throw away an entire pan every two weeks (and incredibly expensive too), and now there is only litter to throw out, which is an improvement, but the litter is quite expensive as was the reusable pan. I also question the impact crystal litter might have on the environment. It doesn't last as long as advertised, so I'm throwing out two bags full of litter each month. While this litter box is less expensive than some other automatic scoopers on the market, the long-term cost involved may make other options a better deal overall. I'm having some serious buyer's remorse now that our cat has used this box for a while.