Used Johnnie Walker Black & Dolin Rouge. This did not taste as expected, but I like it. Much less "smoke" than anticipated. A 30 second stir was plenty dilution (maybe too much and/or freezing the mixing glass might help?). Nice balance of the scotch/smoke/vermouth/sweet/spice from all ingredients. Smooth, easy sipper. Curious to try sub'ing maple syrup for the sugar syrup, as recommended by Jose Cruz.