First try with Silica litter, cats like it.
I've nearly always used Nature's Gold clumping litter for my 2 longhaired cats but thought I'd try this litter on special deal. I left one litter tray with Nature's Gold, and put this silica litter in the other one.
I have the Modkat litter boxes so needed couple or three bags to fill up enough in the tray. At first only one of the cats would try it, after a day or two. Now she only uses this new litter and the other cat has also started preferring this. Keeps smells down, but is quite dusty.