From what I saw on their site, I didn't think that much of the HMG Porter Pack, either. YMMV!
I am far more impressed by the Elemental Horizons Aquilo and the forthcoming Kalais (I hope I spelled that right). The Aquilo is the one that got the Highly Recommended rating in Will Rietveld's review (I hope I spelled Will's name correctly). I don't know how "innovative" this pack design is, but it has all the features I want in a pack and seems to be the first of the under-2-lb. framed packs to have the stays actually connected to the hip belt.
On the other hand, I'm not in the market for a pack, because my almost 7-year-old pack from Six Moon Designs (2005 Comet, unfortunately discontinued) is still holding up just fine and is still very comfortable for me. I've had as much as 35 lbs. in it--my shoulders, back and hips felt fine, although my knees and feet were screaming--but most of my trips I'm under 25 lbs.
I will, however, be looking for a pack for my 12-year-old grandson in the spring, and the Kalais might be one of those on my list. Like me, he needs a good supportive frame with load lifters (evidently my pressure-sensitive shoulders are hereditary), but not a 3 1/2 to 4 lb. pack such as most of the "youth" packs on the market.