We use scoop away multi cat formula. It worked pretty good until some idiot decided to change the formula and now the dust is horrible! It also has a perfume smell which I know cats hate..I'm just glad they are still going in the box! When I just had Neko, we tried changing his brand of litter and he retaliated by pissing on my carpet and as soon as we changed it back, he started using the box again. That's why I hate when litter box companies try to change their formulas! I don't want my cat peeing on the floor just because they want to make a new fresh scent!