Apparently the Havana Club raised objections to the use of the term Havana, which is why Glenfiddich changed it to Gran Reserva.
When I first tasted this last year, I thought it was sensational.
However, I tasted it again in a line up a few weeks ago - it was featured amongst two Balvenies (Double Wood & 15yo), the Glenfiddich 12yo, and the Glenfiddich 30yo.
Either the bottling has changed a little, or the company it was in played a part, but my thoughts this time around was that the Gran Reserva seemed a little flat.
It certainly featured a toasty butteryness that was not evident in the other Glenfiddichs, but it seemed a little dry (woody), if not lifeless. The spiciness I recall from my first tasting was not there.
As a 21yo, it was certainly inferior to its older brother!