Eschewed the labor intensive garnish to make a fantastic drink for those who crave sweet. My wife loves it! Used Boston Bitters de Bittermens instead of bonafide lemon bitters. I also trimmed the syrup (brown sugared) a tad, since the limoncello is already dulcet.
Agreed re: garnish. You can get most of the way home w/ a long twist, carefully curled around a straw and then draped languidly across the rim of the glass.