This bag is fantastic! You will not regret this purchase. If I was rich I would buy everyone I know one of these bags.
I am using this bag daily on my job as environmental compliance monitor for a hydro development project in rainy southeast Alaska. I am bushwacking in wet, muddy, and rugged conditions on a daily basis and use the hip and deck bag to carry a PDA/GPS unit, turbidity meter and camera. The bag is very comfortable and provides easy access to the stuff I am carrying around - not too mention the bombproof protection from H2O provided by the construction. If I manage to get a day off sometime soon I might even get to try it on the deck of my kayak.