I am trekking photographer often visiting remote parts for about a week, previously owning a 65L North Face Terra, although the TNF was superb it was quite small to pack with cold sleeping bags, tents, insulation layers, photographic equipment, cooking accessories.
I soon realised that I needed something bigger, to carry a bit more and also to be in the weight specs of the bag (the TNF heavy loaded would not perform the way it should).
Osprey was my choice after some research over the Internet.
The rucksack is unbelievable, it can carry nearly anything and its suspension system is a dream! You can pack nearly anything and feel like your rucksack is half loaded in terms of shoulder or back pressure! Pockets are everywhere to keep quick access items, side mesh pockets can hold tents like the Zephyros 2 easily, cold weather sleeping bags (Mountain Equipment Glacier 750) easily feet in the sleeping bag compartment (this sleeping bag used was always a pain to fit in other rucksacks).
This is definitely a rucksack worth its money, I would fully recommend it to backpackers looking for a rucksack that can hold items for a week long trek.