I've used Worlds Best Litter for years. Works great with mutiple cats and just one cat. I was going to try a single cat Worlds Best but since my senior cat is happy with it, I won't. My only complaint is that I find it can get a bit dusty even with cleaning out the litter often.

the cat litter clumps well, doesn't give as much dust as clay litter, is easy to clean and helps me feel good about what i'm using to take care of my cats. it's easy to use, easy to clean and helps prevent odors fairly well.

Switching from clay litter to World's Best Multi-Cat Litter was easier than expected. I slowly mixed in the corn litter over about a week, and all three of my cats transitioned with zero issue. It's low dust (way less compared to clay litter) and clumps extremely well. The clumps stay solid (as seen in my pic) and the odor control is impressive.