Okay, back from Scotland. And I had a can. For everyone wanting to know what it tastes like and aren't getting any satisfaction from Ross, it tastes exactly like creaming soda. It was funny actually, I had been telling my brother a couple of days before we went to scotland that my favourite soft drink ever was red creaming soda, but I hadn't had it since I was a little kid. And I get a can of Irn Bru, not knowing what to expect, and to my surprise and delight, that's basically what it was! So there you go.
Unfortunately though, I didn't try haggis