Bought this bag to double as a PC-mounted hydration carrier as well as a daily carry pack. Works quite well for both, though may be a little bulky when mounted to a molle vest, but that's preference. The webbing on the back is great, allows you to mount pouches for whatever you'd need; I carry a HHR, T&T, and sidekick/medical pouch for daily use.
The straps are thin and may be uncomfortable for some, but they suit me just fine on a smaller frame - 5'11"/160lbs.