Nose: I imagine I can identify this malt as a Highland Park right from the first nose. It is this "special" HP smoke and wood note that defines a well-matured, older HP. The sherry barrel influences remain subtle.
Mouth: soft, subtly smoky and sweet. The combination of the strong distillery character and the sherry in the mouth make a multilayered mixture of different armons that act on me at the same time, which is what I think makes this malt so great. It is the multitude of simultaneous aromas that are very different but harmonize well with each other. Smoke, subtle oak, old reserved sherry barrel, sweet fruit notes and ultimately also a bit spicy lovage, which rounds off the whole thing great.
Finish: medium long in itself, but this special last note stays alone in the mouth for a long time and tastes good.
In conclusion, I think this malt is great because it is a strong mixture of good maturation, good subtle barrel and an elegant and unmistakable distillery character. I do not think that one can easily get "better" material at the price currently