Update:
Still working as great as it did on day one. All the boxes still have no odor and the cats apparently approve. Not one incident of inappropriate peeing since I started to use the Odor Eaters litter.

I finally dumped one whole litterbox and filled it with 100% Odor Eaters. Verdict: its as dusty as all the rest.... VERY heavy and hard to scoop on its own because of the larger granules. As soon as that box goes down a little, I'll be adding some regular cheapo stuff to lighten up the volume (and help save on cost - this stuff IS a bit more expensive).