My one cat has had many issues with UTI's and crystals, even to the point of needing PU SURGERY (look it up, it's serious and crazy expensive)! I switched vets when I moved, and when I took my cat in for yet another UTI, the Dr. recommended I change my litter to this stuff. I liked it okay, and my cat didn't get any further UTI's, but I went back to the other kind (precious cat) at some point, because the paper stuff was getting expensive, and clay litter is easier to scoop. It's also easier to see when it's clean or needs replacing.