Awesome pack for a thru R2R hike across the Grand Canyon. 3L bladder fit great and held just the right amount of water to get me to the next water stop. The pack still had plenty of room for change of clothes, med supplies, accessories and food, food, food!
Fit comfortable enough to run with when I hit the flat grounds. Didn't even move or feel it on my back when climbing the rocks over the waterfalls.
Only issue; I am an organizational nut so I would have loved to have another chest strap pouch or another small pouch on the back, similar to the one where the Osprey logo is imprinted.
Perfect pack for a long hike and then some!