This is really an absolutely amazing pack! Obviously Osprey is top 'O' the line and this is no exception. I picked it up for my wife and figured it would get some descent use but she's put it through it's paces. The durability has completely met expectations. We did treat the entire outside of the pack with Nikwax which helped a lot! The moldable belt is a very nice feature, makes it extremely comfortable. The venting on the back panel definitely does it's job. One thing we were worried about was the amount of adjustment for her torso. Problem solved.....there is a ton of adjustment. It was a little more dough than some other packs but very well worth it for comfort and quality. We're looking forward to keeping these things running for years to come.

I got this pack for a glacier trip in Haines, AK. It was perfect. It fit all my gear for a week long winter trip. It's pretty light for a full pack and comfortable!

This is my first Osprey pack. I bought the Xenon to replace a 2006 version of the REI Mars pack because it was large enough but not technical enough. The Xenon has everything I need, straps to attach my sleeping pad snug on the bottom and holding points to strap my tent (w/o the poles) on the top, and I love the outside stretch pocket for when I need to take an additional day pack. Because everything can't always fit inside the bag. I am also a big fan of having side access and this one is capable of top, side and bottom access.

I haven't put it to use yet but because I just took my Mars pack out for the first time to Thailand for 3 weeks and found it to be lacking in features, as soon as I returned home I began the search for a replacement and went for the Xenon. Upon receipt I immediately loaded it up with about 40 lbs of gear including strapping on the tent, extra day pack, and sleeping pad, with the sleeping bag in it's pocket and wore it around the house for about a half hour or more and it was very comfortable. I will however, have to get use to the arching back as I normally prefer that my packs be against my back. This feels more secure to me. Other than that I am confident that this pack will be perfect for my next trip to China (or elsewhere if I change my mind). I have not decided on whether or not to do the molding of the Hip belt, I prefer to let the belt naturally mold with use.

wow!!! not only does this pack look cool, but it also has almost everything i need.
HYDRATION: it has a removable "pouch" for a water bladder... you take the straps off the bottom of the bag, connect them to the pouch & you can carry your water bladder on your back for day hiking & leave the pack at base camp. cons... when it rains on the day hike, the wet pouch either has to go back in the pack, or there is no place for the water bladder.
DETACHABLE PACK: lid turns into a fanny pack with its own belt. nice feature, not too comfortable, but i'm not a fanny pack fan.
VOLUME: room for all my backpacking gear on a two day solo trip (among other things included a thermarest, a sleeping bag with no compression straps & an extra sleeping bag for my beagle)... with the big agnes emerald mountain SL1 tent strapped to the outside. there was even extra space inside!
POCKETS while hiking: one pocket on each side. one is zippered & the other is a stuff pocket only. the stuff pocket will actually hold snack bars and tp without falling out.
OVERALL: the most comfortable backpacking pack i've ever owned... this one is a keeper!!!