Good but not great
Very well made, good shape, very comfortable on the back. The hydration bladder is good and tight, keeping the bladder in it's proper position. The bag fits more than you'd think, but it doesn't collapse on itself when mostly empty - it does not have compression straps, and does not need them.
I'm not crazy about the design of the "front pocket" - there are no zippers or velcro closures on the sub-pockets within, so things don't really stay "organized." Instead they tend to migrate.
Overall, another fine product by Black Diamond.