I usually buy Arm and Hammer, I've found that it works great to clump the urine and it doesn't smell bad. Recently I bought the Double Duty and while it still clumps well, it's incredibly dusty! I feel like I need a respirator just to scoop out the litter boxes, and it's especially bad pouring it into the boxes.
Also, the cats track the dust around the house, I'm finding little gray dusty paw prints on the windows and the fish tank.
And when my cat puts her paw on my face as a cute and loving gesture, it smells like litter, gross! I won't be buying this one anymore. I prefer the Arm and Hammer Multi-Cat or Super Scoop, unscented.