I got this about a month ago and it's so much easier to change the litter box. I got the scoopfree sensitive trays because I have 3 cats and one is little more sensitive than the others. I don't have to scoop or try to empty in the garbage bag to change the litter. You just remove the ScoopFree Sensitive Crystal Litter Trays and  replace it with another ScoopFree Litter Tray. This makes cleaning the litter box so much easier. I absolutely would recommend trying ScoopFree Sensitive Crystal Litter Trays with your self-cleaning litter box.