Weyerbacher is one of my favorite Pennsylvania breweries, which is saying a lot since it is a state loaded with great beer makers. In addition to great regular offerings like Double Simcoe IPA, Merry Monks (one of the finest tripels made in America), and Heresy, an oak-aged imperial stout, they also have a very limited Brewer's Select Series. These beers are only available at their brewery, so good luck getting your hands on one. If you happen to find yourself there for a tour, though, be sure to see what the latest beer in this series is.
This particular brew is Sierra, a small batch milk stout. I really love milk stouts, and this one is (actually, was; Sierra is no longer available) a great example of the style. It's got the creamy body you expect from a milk stout, with a mild but noticeable roasted coffee nose. Very full-bodied but drinks easily, quite smooth with nice sweetness. If this is an example of what Weyerbacher does with their Brewer's Select Series, I'd love to try more of them.