Back in the 1940s, in his The Fine Art of Mixing Drinks, David Embury said of this drink, "One of a few cocktails using grapefruit juice. Not particularly...
I agree with David Embury. Found the rye gets a bit lost and it was much sweeter than I was expecting. Being that we use tree ripened pink grapefruit, our fruit can be a bit sweeter than those picked a little on the less ripe side. Would maybe reduce the grenadine or increase the rye. Still enjoyed the cocktail.