Good beer, limited snacks, lots of seating, and good service. Definitely worth checking out.
They have sampler flights for $2 per 5 oz tasting, as well as very reasonably priced pints of beer. They don't have a kitchen, so they have a limited food menu, but the options sounded pretty tasty. I was a bit disappointed that they were out of most of the snacks I wanted to try just an hour after opening on a Sunday (and we were the only people there for a good 45 mins or so). If that hadn't been the case, I would give One Barrel 4 stars.