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Since the current recipe is a secret, we don't know how much safe, denatured coca leaf extract remains in modern Coke, but for a history that goes past classic American soft drinks, you have to look at the coca-based herbal liqueurs of 1820s Bologna, produced and distributed by the powerful de' Medici family. Before that, the leaf had been cultivated, chewed, and steeped in South America for some 3000 years.
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I first tried this over ice. Light (but artificial) green in color, and an unmistakable aroma. I opened up a can of Coca-Cola next to this, and it was amazing to isolate that particular ingredient. I expected it to be sweet (in the tradition of oddly colored, unusual liqueurs), but there's only a touch of sweetness involved. There's something that makes the back of your mouth tingle, and sort of a grassy, almost minty finish. There are over 30 other components in this herbal liqueur, including green tea and ginseng. At the end it reminds you of an iced glass of herbal tea, and is quite nice.
Later I tried one of the suggested cocktail recipes, making a traditional 3:2:1 margarita with AGWA in place of the Triple Sec. While there was nothing wrong with the finished cocktail, I felt that the tequila and lime juice completely overwhelmed the more delicate flavors and thus it was not an ideal showcase for it.
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There's an illusion of an illicit thrill that's being attempted on the marketing front, an alternate green beverage for those that have tried but hated Absinthe. Some of the ads feature a humorous warning sign stating that it contains coca leaves, and when you mention Bolivia and Amsterdam together like this, most people aren't thinking about llamas and wooden shoes.
Note: This spirit was received as a sample.