I used a lavender scented litter a year or so ago, I think it was corn based, but only one of the cats would use it and then only when most of the other litter boxes had been used. After a year, I ended up throwing what was left away. It may have been the feel of the litter, it was very fine and loose so that their paws would have sunk into it easily, or it could have been the scent. I much preferred it to the perfume they put in the unscented clay litters (that always ticks me off, unscented should mean no scent) but it has to be cats' choice.

I really like the corn based one I bought recently, though I can't afford to keep buying it unfortunately. That's the World's Best Cat Litter, also corn based.