I'm currently using it in the front and rear diffs of the Durango. It seems to be working well as everything's quiet under there. It's also way better than what was in there as that stuff looked like it had never been changed(9yrs 120k miles).
I was aware of the issues with the lube being exposed as being out-of-grade or whatever, but that was back in Jan '09 and am sure any mislabeled bottles are long removed from the store shelves.
Be sure if you're using it in a LSD diff to add friction modifier if it's called for in your owners manual. From what I gathered, this particular grade of ST has none in it's add-pack.