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.
Used Drumshanbo Gunpowder Irish Gin and the barrel-aged orange bitters from Fee Brothers. I guess, I bit overdid the bitters ... Yet, pretty nice drink - I could sip it for hours if it stayed cold enough.