I opened this a few minutes ago, and I'm still enjoying it:
This is the "Mexican version" that I got in the ethnic foods section. The back of the bottle is all in Spanish, and the bottle cap says "Grape" and "Uva" (Spanish for grape).
Brand: Fanta Grape.
Purchase Place: Cub Foods, St. Paul, MN.
Review: This is very sweet, sugary, and syrupy. The flavor was spot-on. It was "basic" and normal, but extra sweet, and I liked it a lot. Oh, and a BONUS: the top of the bottle is super rounded - I've never sipped soda from a smoother, rounder opening. It was a strange, special treat.
Score: 8 out of 10.