I just got back from the Mt. Sizer loop which is a brutal 16 miles. Let me tell you this pack never once got uncomfortable. Granted I took the framesheet out and used my mattress pad as the frame. Probably the least sweaty back Ive ever had and I have used many packs from a range of designs from kelty, osprey, deuter and kelty and this Boreas left my back surprisingly dry which was great. Pockets are just what I wanted in the right places. If you want a comfortable lightweight pack and can keep it under 30 or so pounds then get it.
This review was written in the old system and had content requirements that are different than reviews written today.