This is a better cocktail than the similar but honey-sweetened De Rigueur Cocktail, as unless you have a very full-bodied honey, maple syrup's 'tang' sits...
I made this drink twice with Resurgent Straight Bourbon (100 Proof). The second time I upped the bourbon to 60 ml because I like a spirit forward drink, but it's definitely better at the original measure. Sometimes simplicity is good.