Great overnight pack
This is the first Osprey pack I've ever purchased, and I did so because of rave reviews from friends and internet users alike, so I figured I would post my own review. I'm 6'2", 170 pounds, and I got the large (2,319 ci), which suits my body perfectly. As other reviewers have noted, the Airspeed system allows your back to breathe, no matter the conditions. This pack is great for 1-3 nights, though I'd use a larger pack if I was hiking/trekking for a longer period of time. The hip-belt pockets are easily accessible and great for a digital camera or energy bar, and I like the front-loading feature, in my opinion a must have. However, if you're searching for a day-to-day pack, then this probably isn't the one for you. It's a bit bulky for daily use, especially if you're on a crowded bus or train, or if you're commuting on a bike. I spent 3 years abroad, living out of a backpack while teaching in Latin America and Asia, so I tend to put my packs through one torture test after another. I'm planning another long-term excursion to Australia and Southeast Asia, and this pack is definitely coming with me since it has a built-in raincover that's great for the rainy season. Once again, I highly recommend this pack for hiking, camping, and outdoor use, not so much for day-to-day city use.