Nose - Oak, peanuts in the shell, caramel, a bit of apple, cinnamon, nutmeg, and some dried varnish. The peanut note is fairly subdued and drier/less funky, which I find typical for older Beam/KC. Palate - Medium mouthfeel with salted roasted peanuts, caramel, oak, vanilla, cinnamon and baking spices as the dominant players. The oak and spices round out the medium finish, which does linger a bit but isn't as intense as you might get if it were a higher proof. The oak is not at all overbearing, and doesn't completely dominate the way it does in some of those older KC single barrel picks. IMHO this is quintessential well-aged Knob Creek. Comparing to my recent memory of the 12yr (which I finished my bottle of before getting this), the 15 has more oak and less fruit, pretty much as expected. The blend is well done; there's nothing super-unique here, but it's a well-balanced whiskey that shows some of the best traits of Beam. I'm giving this a 4.0, but would give it a 3.9 if I could. It's a little better than the 12 yr (which I rated 3.75), but maybe just a hair behind some of the other whiskies that I've rated 4.0.