World’s Best Zero Mess cat litter was what finally sold my partner on switching from clay. Tracking really is reduced compared to other versions, though not eliminated. The pellets are heavier, so they don’t stick to paws as much. Clumping is still solid, but scooping takes a little getting used to. I use it in a small apartment, and odor control has been fine. Combined with Kirkland Signature wet food, the litter box doesn’t overpower the room, which is huge for us.