I used to use the Petco brand of clumping litter and it was okay but very dusty. Then I decided to try to use some of the more natural types of litters like World's Best, Swheat Scoop, Feline Pine, Yesterday's News, and a brand of the pearl type. I didn't like any of them and the cats weren't too happy either.
A lady at work recommended Ever Clean and I tried it and really liked it. My cats also love it and now they all bury their poops. I mix the unscented with the scented because the scented is a little too strong and the unscented used alone doesn't keep the odor under control. It also clumps very hard and they don't break apart. It's very expensive at Petco and Petsmart so I buy it at Pet Club. They have it on sale once a month so I stock up on it then. I also never have to throw away the entire box of litter. I just add more as I need to so it lasts a long time too.:)