Not liking stouts all that much, and being a little fearful of a beer that has oysters and moss as ingredients (as well as being vegetarian... but that's really beside the point: it's beer) I haven't tried the Black Biddy. I've been told it's an excellent alternative to Guinness when you're looking for something that tastes a little crisper and a little cleaner.

In case you're curious about the moss... the Black Biddy uses that as the beer's fining agent rather than using a chemical compound. So - the Black Biddy is %100 chemical free if you're concerned about those sorts of things.