As any great adventure, this pack takes a little investment of time to get it right. When I first tried it on all my weight had to go forward to regain my center of gravity and feel balanced. I almost went with something different but fortunately I was determined to take advantage of the new AG. Once I had the harness adjusted properly for my torso and the shoulder straps/load lifters dialed in....WOW! This thing is a BEAST. The compression straps are all in the right spots, the features abound and the water bottle pockets work much better than other reviews lead me to believe. The AG system works amazingly well and for me personally I was willing to give up a pinch of breatheability for the added comfort and support off my back, neck and shoulders. One other small compromise was about 1lb of weight compared to similar packs in the same class. I have been hiking & Backpacking for 20 years and this setup has changed the game for me. I was able to extend my days at Yosemite by hours as well as adding many miles on top of my previous limits and still had energy left and felt less pain the next morning. Honestly carries like a dream, my 50 +/- lb load felt like 35-40. The way the pack 'hugs' your back genuinely kept me feeling much more confident scrambling as well as on steep descents as there is much less weight shift or bounce. I would say con-ish would be the weight (acceptable to me for the features, comfort and support) Could breathe a hair better (also forgiven for the above mentioned benefits and pack durability) Slight tweak to the hydration reservoir sleeve so that the pack retains more air circulation when 2+ L reservoir is full and installed last but not least, Include a rain cover please! There are so many small details that make this pack great, the way the zippers are tucked under the protective overhanging packcloth, adjustable sleeping bag divider, ability to have lower reverse straight jacket compression straps inside or out. A+ Love it!