I was optimistic, but it came out too bitter for me, which is saying a lot, because I like Eeyore's Requiem, among others. So, I added 1/4 oz rich syrup, and then it was sweeter, but still too bitter. I give it 3/5.
I found that a 'Negroni' style combo 1:1:1 of Campari, bourbon (Bulleit) and Averna made a very appealing beverage. Would post, but too similar to others I think.
Rather nice, if a touch sweet. I think I might try rye (aromatically drier than bourbon), reducing the 1/2 oz parts to maybe 1/3 oz, an adding 1/3 oz dry vermouth or sherry.