As may have read while camping we spend a great deal of time on the water. I really put the OB iPhone bag through the ringer and it came out dry every time. It got splashed a lot, dropped in the water twice as I was getting out of my kayak and it sat on the bottom of my boat for extended periods.
What sealed the deal for me was when we were practicing wet exists and self rescues. I placed the OB (with phone) under the bungee so it would not be flopping around. I must have flipped my boat ten times and showered it with water in my failed attempts to get my sorry you know what back in my boat, and not a single drop of water got in!
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alan j quinn 
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