I own it for 8 months and I've made 3 treks with it. Corse (1 week, snow), Lycian Way (1 week, good weather) and 3 days winter trek in Russia (-25 C).
I'm never accurate with my backpack. I even don't pack it in foil before the flight.
The only signs of use are few damaged cells in the side mesh-pocket. So the backpack is well-made.
It has enough space for 10 days trek in warm weather or for 7 days winter trek. You can use all pockets and all straps to extend the volume of your backpack. I always put my sleeping mats under the side straps. You just have to be accurate with your equipment list and do not take unnecessary things.
It has a good frame, very good for my back. Reasonable belt. Unexpectedly, I liked special mount for trekking poles. I've never used it before but this backpack has this convinient option.
1) It is difficult to clean the pack because you can not remove the frame.
2) 2 Useless inside pockets (-100gr?)
3) You can not seat on your backpack.
OspreyExos 58 Backpack rated 5.0 out of 5 stars from 1 reviews.