Our national dish here in Scotland!
On one hand, it's a very convenient and tasty way to get some organ meats in - liver, heart, and lungs. Usually from sheep/lamb, although cheaper varieties (like the round bits you get with a cooked breakfast) use beef. There's also a healthy amount of beef fat in there.
On the other hand, it's got oats in it. Not the worst kind of grain from what I gather, but grains nonetheless.
Yesterday I found some MacSween's "cocktail haggis" (yes, really) on offer: http://www.macsween.co.uk/images/mac...tail%20100.jpg . It's basically a bunch of mini-haggises linked together like sausages. Had some with my eggs and bacon for breakfast today, delicious and filling!
Overall I'd say it's something to have every so often, perhaps I'll buy some every few weeks and have it with breakfast for a few days to get the benefits of the organ meats. The oats put me off making it a daily staple, and oat-free/gluten-free/low carb haggis doesn't seem to exist. Although maybe it can be made? Making haggis sounds messy but I believe a friend of mine who's a bit of a foodie once did so.
Thoughts? Is it widely available outside Scotland? Here it's in every supermarket so as I say it seems like an easy way to get a good organ meat helping.