J Lambowrote a review of The North Face Diez Down Jacket - Men's on February 25, 2011
This thing packs down to a softball and instantly captures your bodies thermal energy. I got the blue and it's very perdy! People are blown away by the weight of this thing when they pick it up, it completely catches them off guard and it packs down so small that you'd be crazy not to bring it along. When I pull this thing out of its own pocket I feel like Santa in movies when he pulls out canoes and other massive gifts out of his bottomless bag.
So far the only gripe I have is that a few feathers of down has managed to penetrate the inner (next to body) surface of the jacket. A nice pinch and pull has stopped this from snowballing so that's something to be aware of.
I'm 5'11" and the Medium is perfect.