Sublime. The ingredients compliment each other perfectly, creating a moreish drink that tastes far greater than the sum of it's parts. I upped the bourbon and Chartreuse to 0.75oz as others have done. Off to make my second now...
Delicious, more-ish, lip-smacking goodness. I found omitting the sugar, but dropping a syrup-coated Luxardo cherry into the glass instead, to be the perfect recipe.