So, one thing I expect from my Booker's bottles is that, whatever flavor they are, they are potent when they provide it. The nose is a little dull, which feels a bit sacrilege, especially in the Glencarin. The initial taste starts as a bit of a needle effect; that is, the flavor begins very concentrated on the tongue, even if you swish it, and then it absolutely explodes everywhere with no regard. I specifically use the word "flavor" because it's actually quite hard to distinguish it before the aforementioned explosion. Smooth, perhaps even a bit citrus. This hardly matters, however, because the entire mouth opens to such powerful fire and spice that it's actually hard to contain. Sure, part of it tastes like rye, but much more of it tastes like if you ate a full tablespoon of all the spices that go into a pumpkin pie. I feel like the finish on this one (and my breath included) could absolutely melt fresh snow on the ground. This is beneficial, because this would make an amazing deep winter night sipper.