Initial review.  I actually love the size.  I see a lot reviews saying it is too small - but it is perfect size for what I want it for (hold a few cell phone chargers, few granola bars, small point and shoot camera with plenty of room to spare.
I am 5'10" 200 lb male, I also did not think it looked too small for my body.
The layout of the compartments seems good.
And the price is VERY reasonable.

Now I have not yet actually used it yet and will update this review once I get back from a 10 day trip where I expect to use this heavily.  I am expecting it to hold up in order to keep the 4 star rating.