Weight is ok, could be a little easier.
Material seems sturdy, what irritated me is to point out that it does not rot. Hopefully I have to give in special backpack not sometime.
The settings are optimal for me, I had relatively quickly found the optimum position, but the setting is a little complicated, Velcro holders hide sometimes to some inaccessible places.
Size is ok for my needs, bicycle tube, tool kit, banana, apple, cell phone, keys, etc. Arm fits everything into it.
Function, as I said was traveling in southern Spain and the temperatures were very springlike, and the back ventilation I have found to be very well the concept of the network frame works very well. No nassgeschwitzer back, which I liked very well.
The value for money I like that, I have only a little Allerding paid more than 50!