All in all, a great pack!
Functionally, the bag is great. Love the minimalist design and the way it conforms to my back. Overall, very positive on it, and would highly recommend it.
One comment on fit: I'm 5'11" and I needed the S/M size. The back pad of the M/L bumped the bottom of my head when the bag was snug at my waist. Maybe I have a short torso, but I was surprised to have to go with the smaller size.
Two criticisms: 1) I have an avvy shovel with a D-shaped handle, and the handle doesn't really fit under the top of the pack when it's in the front compartment. Not a big deal - I just let it stick out. But a minor criticism. 2) The writing is wearing off and the front buckle broke on my first time using it. Granted, I probably dropped it on a rock or something. But I was still a little surprised.
All in all, functionally a great pack, and I would recommend it to anyone, as long as you get the right fit.