Was delighted to find this on my desk today when coming into work. There's some good people that I work with, it brings a tear to the eye :'D.
I guess I'm a little bit of a root beer connoisseur (or try to be) and like to pick up / try all sorts of varieties so I suppose one of my coworker friends decided to help me on my "quest." One my current favorites right now is Natural Brew, it has a nice complex taste that's quite different from your run-of-the-mill "chemicals and soda water" root beer. I'm looking forward to trying this one!
Edit: it's pretty good, very similar to Natural Brew, has a good complexity, slightly more apparent carbonation, it would be a hard pick to decide from the two.