Just picked up a six of this last night and its fantastic! One of the best porters I've had in a long time. Carbonation was spot-on, hints of roasty chocolate and coffee. very drinkable.
The only bad thing I can say about it is the label design, it looks like they went with "My sister's friend's son in high schoool has a computer, maybe he can design it for you".
From their website:
OG: 1064 TG: 1018
Grain Bill: pale 2-row, carastan, dark crystal, special “B,” chocolate
Color/Number: Dark chocolate brown