i picked up the AGC one this year. i'd been using an S4 lockdown pack for a few years, so coming from that i really like the locking buckles and the fact that it's totally covered up so i don't get it full of pine needles moving through reprod.
i think i would like it better if it opened forward, took me a little getting used to pulling my binos out. the material is a little rustly, but i suspect that it will quiet down with some use. i really like having the extra pockets for little stuff that would be rattling around in my vest otherwise. if i wear a backpack walking into an area i'll often ditch it along the way, it's nice to be able to keep a knife, and a few little essentials on me. since the harness snugs up tight and doesn't move, it doesn't bother me at all to carry some weight on my chest.