Made this and thought it was disgusting--too sweet and no complexity. Added maybe a little less than an ounce of bourbon to one and rye to the other and it was actually pretty good.
Made a 1/2 scale recipe of this one. It is very sweet. Used two dashes Angostura. It was pretty spicy, kind of reminded me of cinnamon cough syrup or something. It probably needs a little something to take some of the sweet edge off of it to be really good, but it was alright. Might play around with it some more.