It's very good - how can chartreuse drinks be bad? but there isn't much going on outside of that. I upped it to 15ml of each chartreuse and it's a vast improvement but the chartreuse is doing basically all of the heavy lifting of the 4.5/5.

Made this with substitutions: used almost the last of my precious bottle of green Chartreuse, tried Galliano to match the color of yellow Chartreuse if not the flavor profile and a dash of Peychaud’s bitters. And goosed it up with 3/4 oz of vodka to get to the same detonation as a French 75. It was delicious!