HikingtheDream wrote a review of Osprey Packs Atmos 50 Backpack - 2800-3200cu in on January 9, 2013
Familiarity: I've put it through the wringer
I own several packs mostly Osprey. This is the pack I use the most. Great for long weekends. Great for a long week hopping shelters on the AT and hammock camping. Just enough room for all my gear and supply for a long 3-4 day hike in 0 degreewinter weather. Plenty of spare room for Spring, Summer , and Fall hiking. The best supension in it class. the compartment are set up perfect with out a lot of extra weight. Only thing if you like to seperate your sleeping bag (and Pad) from the rest of your gear for easy access. Go next model up for seperate zip open bottom. I have beat it up for over a year.