A nice drink, although I fiddled with it a bit. I used only 1/4 oz simple, but then I tend to like my drinks without detectable sweetness. I upped the rye to 1 1/2 oz to get it to stand up to the Becherovka. I added 2 dashes of Regans' orange bitters, which reinforces the orange notes from the twist and adds significant bitterness (since Becherovka is so mild). I really enjoyed this drink, especially since it highlights an unusual ingredient that is pretty widely available.
Finally tried this one. Yup, delicious...Made it "Dan's way," except I split the difference on the syrup at around 1/3 oz. Used the new Dickel Rye, which worked great... First drink I've tried using a "tiny" amount of Fernet where the flavors mingled so perfectly that if I didn't <em>know</em> it was there, I might not have guessed it.