I used a Ferdinands Dry Vermuth and Tanquaray 10 and found it too sweet. I added a dash of supasawa to keep a clear drink. Was quite nice but will not be my favourite.
This might seem like a weird suggestion, however! Hear me out.
I made a version with Nolie prat, and Citadel gin, and after having forced a few friends to try it. I found, that adding a few,(read 2-3) drops of simple sirup, massively improved the drink. It appears to open up and almost have a floral after taste, somewhat akin to a good Alsace Gewürztraminer
Tis indeed a tasty cocktail! Just been making it again and have tweaked the recipe to be a tad closer to the original equal parts recipe. I've also omitted orange bitters but the lemon zest twist becomes crucial to the balance and aromatics.