Not bad. Comes over as a little heavy on Chartreuse for me, but maybe that's the point. Blends well with the botanical in the gin, but it's definitely a herbal-heavy drink. The grapefruit and simple syrup add that touch of sweetness that round it out nicely though. Would have it again, but maybe bring the chartreuse down to 3/4 of an ounce and add a bit more grapefruit juice.