I recommend trying them before you buy one. Much like boots, they fit each person differently. In the past week I happen to be in Denver to visit family and drove through Dixon. Since I wouldn't mind getting a new pack this fall I stopped by both Kifaru and Kuiu to get fitted and test them out. I compared the Icon Pro to Kifaru's new duplex. Put 80lbs in each. I didn't do a hike or anything, but got a sense for how they fit my body, how they handled the load, comfort of hip belt design, fit to my back, pressure points, quality of load lifters, etc.. There were pros and cons to both of them, often in different areas. They're pretty different in fit (neither good nor bad, just different). Each had their shortcomings as well. I was hoping to find a clear answer and walk away with the feeling of "this pack is for me"' but that did't happen. Some of my older mountaineering packs are just as good or even better in some areas. They just don't have the newer lighter fabrics. I decided I needed to try an EXO pack (friend of a friend is willing to let me try his) and hopefully a Stone Glacier (very hard to find). Much like boots, I really don't want to buy one sight unseen and end up having to sell it because I'm not satisfied with the fit.