When I saw the new version being released, I got excited by some of the features/stats. Unfortunately, the comfort didn't live up to the hype.
After trying on a number of packs at an REI several years ago, the Exos was my choice based on comfort. It fit my body type well and offered a number of features I liked. I used it for quite a while and loved it. I ended up selling it for something smaller, but always missed using it for the bigger volume trips.
So, when I saw this hit REI, I ordered one right away and eagerly awaited its arrival. The features are all great - big hipbelt buckle, flapjack cover when the lid wasn't needed, kept the trekking pole stow and go (which I used ALL the time). I loaded it up with 27 lbs of gear and walked around some steeper trails near my neighborhood. The hip belt and shoulder straps have both changed and both to my disappointment.
The padded portion of the shoulder straps is shorter and feels very awkward. The hip belt now sits in a way where it applies pressure onto my hip bones and makes it one of the most uncomfortable packs I've ever worn. My Gossamer Gear Mariposa and ULA Circuit are both about the same size and are orders of magnitude more comfortable. I returned it immediately.
I will say that this pack (like its predecessor) probably fits lots of people very well. I applaud Osprey for trying to bring a mass market lightweight pack out with continued innovation. But, these tend to either fit great or terribly. Unfortunately, the newest one is the latter for me.