I have never had it before, but I have heard a few studies that say that it is very bad for your health and if you drink it long term it can damage your liver.
I have had 5 hour energy before. It isn't for everyone obviously. But personally, whenever I use them, I try to pick the ones that taste the most like cough syrup, so that atleast I don't gag over it.
I would think you would gag at cough syrup.
Anyway, yeah. I don't use it often, only when I really need a boost, and it doesn't leave you with a crash. 😉