My wife has the Exposure 50- in her opinion, it is fine for cragging and hauling stuff around trails, but sucks for scrambling and she would not think of climbing with it. The frame is tubular aluminum that, for her, extends behind her neck and offers nice load transfer but wacks her every time she looks up. The frame is not removable- which I find important for a climbing pack, and is simply too stiff. But what do I know- people here haul 40 pounds in frameless packs (ouch!) and likely climb just fine in loadmonsters... just make sure you have head clearance with the exposure series.