Not very good.
We decided to try this litter since it said that it would slide right out. That was not the case. I still had to scrap it off the side and bottom of the litter box. My cat started refusing to use the litter box. She started doing her business beside it. We went back to using Fresh Step and have not had any issues.
The Kitty Cat Rebellion
I bought a brand new litter box so I could give this litter a fair trial without any residue from any other litter or any scratches or defects in the box that would cause litter to stick to it. My first thought was that it is was a lot smoother and the pieces much smaller/finer than I was expecting. My cats observed me and both had urinated in the box within the first half hour after it was filled. The neat freak in me wanted to immediately scoop it out but I decided to give it a little time to harden since it's after that that the litter adheres so strongly to boxes that it is like scraping concrete off the sides and bottom of the box. After a half hour of drying time, I scooped it out. It seemed to adhere to itself more strongly and less so on the box, although there were still remnants on the side of the box. It was not completely dry when scooped out so that may be the reason it did not fully come out. I was unable to review it after that because, after initial use, the cats did not use this litter again. I don't know why not. I thought Tink would like the smaller and finer particles because her previous guardian had her nails lasered off so her paws are sensitive. Kira has asthma so the light film on the particles may have bothered her. The humans also experienced asthma flares after the box was in place