It's nice that the herbaceous Benrinnes shines through despite the dark sherry. The longer in the glass, the more. Overall, a very complex and pleasant nose.
Palate: quince jam with too much sugar, clove spices, tea cabbage, some wood. Really viscous and very sweet, the bit of wood sets a counterpoint. Maybe a little too smooth and a little too sweet, but I think it's very nice that the distillery character also comes through on the palate.
Finish: short to medium long. Clean feeling. Quince jam with a dash of red wine. Slightly herbaceous. Warming, but never alcoholic. A little flat though.
Conclusion: really, really good, very tasty and pleasant to drink, viscous, but not "heavy". The alcohol is extremely well integrated. But there is not enough wood here for my taste, and the finish is too short.
Edit: The empty glass smells like walnut.