I recently did a tasting vertical of Glenfarclas 12, 15, 17, 21 and 25 along with the 105 NAS. I have full bottles of the 12, 17 and 105 NAS and got a sample set of the others to see what I was missing. My feeling is that I was not missing much. It seems like GF peaks at around 17-18 years with their production offerings. The 15 year old at 46% is really good and the extra abv helps. I suspect that any really good older barrels are being sold as single cask offerings. This 17-year old release really seems like the sweet spot of the whole GF production expressions in terms of price to quality. The nose is your typical strong sherried, dark fruits and spice The palate is carmel and plums. The lower abv hurts it here. Although it is fairly rich, it lacks the thickness and power of a higher abv offering. IMHO, it's not as good as the Balvenie 15-year sherry at 47.8% for example. Finish is typical baking spices, maybe some citrus and dark orange chocolate flavor. I have not had any of the Glenfarclas family selections or single casks but reading the reviews it seems like those are where all the high quality barrels are going and the regular expressions are where they use the rest of the distillate. This is a very cask-driven whisky. The flavor is consistent across all of the expressions but it is very much a low abv sherry flavor and not that much different from other low abv sherry expressions. I would have a hard time telling this apart from the 16-year-old Aberlour for example. It is kind of a generic cask-driven sherry scotch style. If you love that style, you will like this.