The initial taste is a touch off-putting (boozy, grainy from the rye?), but the aftertaste is pretty stellar with the flavors marrying and the vanilla bitters emerging. I did use a sugar-free Coke, which seems to leave room for additional cherry syrup flavor that I'm craving. My house bourbon and rye are both over 100 proof, so you may have a different take with standard-strength brands... I just got a bottle of Bob's Vanilla Bitters (which I can't imagine using that often), but I've been lucky with the first few cocktails I've tried it in, this one included.