Pretty good, overall vaguely reminiscent of a Penicillin, somehow, probably because of the smokey, sweet, lemon and general whisky direction. But, IMO, more herbal and complex. Really growing on me as I sip.
This is a truly fantastic drink , but the comments here are a confusing mess. One mentions Cynar (???) and another claims this is "too sweet", despite the use of a rather extraordinary amount of dry vermouth relative to the Campari and Amaretto. I rather suspect that if one finds this cocktail too sweet, that such a person does not enjoy very many cocktails at all.
Although I am admittedly biased, as I love Campari and Amaretto, I suggest any curious readers to try it for themselves, as this is really a an underrated cocktail, especially given the simplicity.