Really cool bag and worth the money.
The concept of the bag is great. Definitely secure. Better than what I was expecting actually and plenty big. I agree there is a hole the size of a medicine bottle at the top but what are people going to take? Loose change? There is an extra zipper inside to secure small stuff. There is no way someone would be able to pull a Gopro in a waterproof housing out so the hole doesn't matter much. I wouldn't let this bag out of my sight if I can help it because it could be stolen with proper tools but the average public thief is looking for a quick grab and not something he/she has to work for in plain view.
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