Overall quality is EXCELLENT. Every bit On par with Kifaru which I have owned over a dozen. Breathability is VERY good. EVERY single strap had a velco loop to roll up excess strap length. Small but nice addition. Overall pack feels very light but extremely well constructed. I did load up 50lbs and took the dog for a 4 mile walk with pack on.
SUSPENSION: Took no more than a minute to adjust torso correctly. Very effective simple system. Padding is not as "dense" as Kifaru but I dont see it being any issue. Load lifters work great. Upper delta strap same as Kifaru. No lower but see no need for one. Frame provides superb vertical stiffness. However, it gives a little left to right flexability wise which I actually really like. Very comfortable as I feel it moves with me. I do not feel like I am strapped to a board. Lumbar pad is not as big as the Duplex but I think it is perfect size. It is made of a NO-SLIP material which works well. Just one note on belt. I am a size large with this Exo. The Exo large is about a Kifaru Medium. Maybe a HAIR bigger but definately smaller than Kifaru Large.
Only thing I would change which I talked about to Steve is the POWER PULLS. Ever since they came out there was always any issue of them not "staying tight and potential slipping". This pack is no different. What Kifaru did was simply add an extra loop to the power pull. It makes it ROCK solid. whereever you pull the belt is where it stays. ZERO chance of slipping. It is a $.50 addition that make a world of difference.
3500 Pack Bag: Absolutely superb quality. If you are a plain jane duffle bag on a frame person, this pack is not for you. If you want great features and organization, look no further. I absolutely LOVE the features of this pack. A shit load of thought went into this pack. From the side zipper access, lots of storage, reverse lid, excellent compression it seems to have it all. I know some made comments about the stretchable pockets not for them. I however like them. I will definitely be shoving rain gear or hat or anything else I will need quick access to in them. Side pockets will swallow up a lot of gear. Main bag has plenty of room plus it has a snow collar. Bag also has ladder webbing on front which will work for my Kifaru Pods if extra space is needed. Overall I am super happy with my purchase. Quality and features vs cost? This pack is in its own league.
-Jim