I used Del Maguey Vida mezcal. maybe good as a shot, and it is definitely an "interesting" drink...but like some previous reviewers, I don't know that I'll make another on the rocks any time soon. feels like a really good idea that needs something to balance it out.

Gary Walther's suggestion of Nonino plus orange bitters/grapefruit twist might be a better drink for my palette (though I do love Montenegro in other drinks).