great pack. less so if you're carrying big weight.
I wore this pack for ski touring this spring, and I was happy with it.
Pros: I love the buckles on the side compression straps. They make lashing skis to the pack (and taking them off at the top of a booter) so easy. It's fairly light, it's a good size for one or two days, and it carries well even when it's not full. All the features are simple, functional and well thought out.
Sizing: I'm 6'00''. M/L fits perfectly.
Cons: I don't think this pack was designed to carry big weight. I wore it on four trips in late spring where I had to hike a few miles with boots and skis lashed to the pack - a pretty heavy load when you add H2O, crampons, etc. After that, I wished BD had used more padding on the shoulder straps and hip belt. Some of the straps (the stabilizer straps in particular) slip under heavy weight. Because the pack is narrow at the bottom, I sometimes kick my tails when I hike downhill with my skis strapped on A-frame style. (However, I was riding 198's, so that may have been a contributing factor.)
Bottom line: awesome pack for one or two days of traditional ski touring (skinning from the trailhead). Less awesome, but still good, for hiking into backcountry skiing with all your gear on your back.