We use the Johnny Cat Natural clumping/scoopable. It is unscented, no funky smells and it works great! The deodorizer in most litters makes me cringe, I can't stand it and could smell it the minute I walked in the door. We also have a very finicky kitty that when he is not happy with his sand box will pee on anything left on the floor, towels, clothes etc.
We have 3 cats, 6 sand boxes and scoop them every single day, religiously. 3 are covered 3 are uncovered, each cat seems to have a preference