That's too bad, I've had the 15 sherry wood finish and it's quite good. I have two bottles, one is 43% and one is 40% which always confuses me since the 43% is usually better.
They also have a 12yo Sherry Cask Matured not to be confused with the 12yo Double
Cask Matured which is available in the USA (and parts of Canada ((the better parts)).
and to be even more confusing they bottle a 15yo Double Cask Matured also......as well a the 16yo Double Cask Matured as you mentioned.
and then........for the French market the 15yo Cuvee Marie D'Ecosse which is Double Cask Matured (but it says it in really small letters).
Anyway, they're all very good.