Charles MacLean, a writer and whisky connoisseur, had this to say about Glenfarclas 58:
Taste: Smooth and fresh; not as sweet as expected and quite tannic/mouth drying with some spice. A long, rounded warming finish.
Diluted to 40% abv: Still smooth, fresh and slightly sweet; a trace of ginger in the warming aftertaste.
Development: Warm sand and sand dunes, with suntan oil.
Comment: Layer upon layer of flavour. A splendid old whisky; still lively, and not displaying any woodiness. Much influenced by the American oak cask, but wholly beneficially. Best enjoyed unreduced. Cheerful and friendly at natural strength.