Excellent, almost everything in this package is wel designed. All the good thinks are mentioned in specs, so I'm going to talk only about the dertails to improve. The keys hook is inside sunglass pocket, maybe the front pocket was better (maybe that hook is for other purpose). Waist belt is not removable (or I can't find how to). Shape-Loc reservoir avoid the reversible feature of standard Hydrapak reservoir.
As you can see, those are only details, everything else is perfect.