XO refers to extra old, and this bourbon certainly is that. When compared to Kentucky Vintage, it’s drier, spicier, and more intense on the palate-even when its higher proof is diluted with water. Firm mint, resinous oak, leather, and even a waft of cigar smoke are the highlights of this bourbon. Long, dry, spicy finish and a bit fiery. For those who like a big, bold, oak-influenced bourbon.