My cat was reluctant to this litter box for a while. She is not used to the crystal style of litter and the box is a bit imposing. She eventually started to use it. Soon after, a poo got stuck in the grate. Overall, it's convenient that I don't have the scoop the litter. I haven't had to replace the litter/tray yet, so we'll see how that goes. Also, the automatic scooper is pretty loud. Woke me up in the middle of the night the first time I heard it. I also have concerns about the durability of the box. It's thin plastic and I don't know whether it will hold up after extended use.