Comments about Camelbak Camelbak Asymetrix 15 70 oz. Hydration Pack:
Insulated water bladder keeps body heat from making the water warm; great feature and I love it.
Pack has one outside unzipped pocket on one side, which is great, but another on the opposite side would make it terrific.
Pack could also use a few more utility loops, and a little further down, on the front side of shoulder straps for suspending small items (compass, etc.) to make it easy to get to them.
Although pack is designed to allow airflow between it and your back, I'm not certain the design works all that well as my back sweats a fair amount when carrying it. But it may be that I'd sweat more without that feature, too.
Anyway, everything else about the pack (quality materials and construction) are terrific. I'd buy this brand again.