Updated details for all interested.
I've had the pack now for awhile and have very little complaints. Overall, I think the quality is very close to HD. Sure, it definitely has some imperfections if you REALLY eyeball it but most people don't even bat an eyelash looking at it. I think its actually an exact (or pretty close) copy of the pre-2014 boxes. It does have weather stripping and actually has been tested quite a bit in monsoon type weather. My luggage stayed perfectly dry. It lined up perfectly (pre-drilled and has a very high quality metal mounting plate) on my 2015 luggage rack and my lady quite enjoys having a nice wrap around seat now.
My only gripes:
Hardware is good, but not as good as HD. Not junk, just not great.
All of the nuts/bolts are cheap and have all wiggled out at some point. I've replaced most with new stainless hardware and locktited them. I'd recommend just using locktite from the get go.
There are a few surface imperfections, but honestly, just nitpicking.