I've had it before. It tasted almost, but not entirely, unlike sausage. Not wholly unpleasant, but still quite different. Of course, I haven't had a real haggis yet, but I ordered one from Oatmeal Savage for a "End of Summer and Last Hurrah Before Separating Forever to go to College" party with some of my mates.

But, back to topic, the canned haggis was pretty good, all said and done. No casing, it looked a bit like hash, and I just dumped it into a bowl and microwaved it. As I said, it tasted pretty good, but unidentifiable as a distinct taste; a sort of sausage-y flavour, in my opinon.