I bought this pack for long weekend trips, since that is just about all I get to do these days, and I love it. The ergoACTIV belt makes the pack feel like it's a part of your body. I've loaded this pack up with 35-40 lbs of gear and dog food and I can barely tell it's there. In terms of durability it's been on two long weekends hiking, a week in the BWCA, and checked twice in the last couple months and it seems to be holding up fine.
No complaints at all. Absolutely a great backpack.