Well I tested it with the V when I got it this past Friday. First thing I noticed is that it is much smoother with the V than the Red Bull is. Did not have that kick of a taste like Red Bull does (IMO) and tasted very good. Woke up perfectly fine and no headache or anything. I also had one after a workout today and it does hydrate you and Iit actually gives me a good boost. Not every energy drink works for me but this one does. With the added benefits Like milk thistle (which I take a daily pill) and no aspertane (sp) I give it a 5 star. That’s my take on it anyway, may be different for others.