An extremely good pack that should last you a good number of long treks even in very rough conditions (ie Alpine/back-country). Combines technical elements with practicallity. Good quality materials and construction with a large carrying capacity thats well distributed. Wait for the sales though because it is expensive, around $500, but you get what you pay for.
Very durable
Light
comfortable- especially on longer walks
narrow profile- very manouverable
Difficult strapping adjustments