Rum, lime and curacao (and sweetener) - a dependably delicious combo. IDK that I could tell I was tasting cinnamon simple syrup, but the drink overall had nice rum flavor with prominent lime/citrus background, on a pleasantly sweet base. Very nice!
I think this is too sweet - I'm not sure how the taste guide (above) skews to dry, but it was too much for me to enjoy. I used a 12 yo El Dorado and Byrrh - that may have been part of the issue.
Simple cocktail, and I thought it was very good. I enjoy Negroni variants - I think this is quite a distance from a Negroni though. Brilliant, clear ruby color, with a hint of yellow/orange - nice in the glass. Rum character leads, but it is closely followed and bracketed by modest bitterness from the Byrrh and Campari. The rum, Byrrh and Campari also work together to create an interesting aged spice flavor. Not a favorite, but worth a shot for those looking to try every possible wrinkle on the Negroni template.
The fernet and brancamenta are clearly the dominant flavors, but the lime and ginger beer combine to lighten and brighten the cocktail. The notes mention this as a brunch cocktail, and I think that would be very nice and refreshing. I don't think I'd use this as a digestivo - there are other fernet drinks for that.