Purchased two of the Overwatch bags from two previous woots. One is my coaching bag, which carries my netbook, tablet, coaching credentials, minor first aid supplies, along with a multitude of other small items. I also grabbed one as a small bug-out bag.
Very solid bag (construction-wise) with a surprising amount of storage for the size.
but, you definitely feel every ounce beyond a certain point with the single cross-strap design. The lighter strength nylon, compared to other manufacturers' similar offerings, probably helps with this, but still a word of caution.
Obviously it wasn't a deal breaker, as I bought a second one, but the longer I wear it, the more I feel it. (vs. the two-strap, full-sized backpack I used to use)