Cask at the brewery - I was sceptical about this brew (a bourbon aged esb sounds like a bad idea), but it turned out to be pretty decent - sadly, the nice hop bite and bready malt of the original are nearly gone, though - the overall impression is of a creamy, almost oak-flavored english pale ale - the bourbon flavor got a little out of hand at times, but in spite of my complaints, I really did enjoy drinking it.