Energy Drinks

Just wanted to see what you all thought about these things.  http://www.5hourenergy.com/  Since I don't drink coffee or anything besides skim milk and water, do you think once in a while it would be ok to have one of these for a pick me up?  They claim to have no surgar and zero carbs.  Since I have not have any caffeine beverages there are times where I am draggin my feet and thought maybe one of these may help lol.  Thoughts & suggestions?

Since you don't do caffeine (and we can be very sensitive to it post op) I would only try the decaf one myself.  Also, the B vitamins won't be absorbed so don't count on them as part of your plan that day.