Made this with B&B instead of Benedictine (it’s all we had) and I think it mellowed it out a bit, not as sweet as others complained. Very herbaceous and sweet enough. It looked naked without some garnish so we added an orange peel twist, it complemented the herbaceousness!
I've seen comments about the sweetness level of the cocktail, and I can see how it can get a tad sweet for some tastes, but the key is to use an over proof rye like Rittenhouse 100 to help balance with a bit more alcohol. Definitely dial back the benedictine and chartreuse to 1/4 or so if you are don't have an over proof rye on hand.