I bought this bag at GenCon 2011, though mine has the 'Bag of Holding' logo stitched on it instead of the Handy Haversack logo. It is still, however, the same bag otherwise.
Overall I'm happy with the purchase and use it as the primary gaming bag even still. I won't be going to conventions without it.
The thing is BIG. That can't be understated. The design of the bag allows me to keep:
Pathfinder Core Rulebook
Pathfinder Bestiary
Character folders for 6 NPCs
4 volumes of an Adventure Path
Map Pack from the ADventure Path
2" thick case of miniatures.
Spiral Bound Notebook
BIG bag of dice.
Spell Cards for Each Character
Condition Cards
4 Flip Mats
Tokens!
More Tokens!
Initiative Flags
BIG bag of pencils, scissors, other important tools.
And... I think I've got room for a lot more.
However it is UNCOMFORTABLE to wear. The straps on the shoulder dig into your arm because they have no padding. I'll likely figure out a way to add my own.
I also had some wear and tear. The metal fittings for the shoulder straps broke, and I had to tie a knot to replace it. Similar failures for other metal bits happened less catastrophically.
