I had one other GuS "Grown-Up Soda" last year and it wasn't the best, so I took a risk trying their root beer:
Brand: GuS "Grown-up Soda" Dry Root Beer.
Origin: New York, NY.
Purchase Place: "Minnesota's Largest Candy Store," Jordan, MN.
Sweetener: Cane Sugar.
Review: The initial flavor was pretty good, but it was thin and watered down. There was a bit of a strange aftertaste that didn't feel natural. The other GuS "Grown-Up Soda" that I had had SOME potential, but I just didn't care for this. The birch oil was an interesting touch, but it just wasn't for me.
Score: 4 out of 10.