It works and does what it says.
Didn't make me jeetery, wired or felling run down when it wore off. I've looked at the bottle many times and wondered.. so I said what the heck and tried it. Within half an hour I was feeling fantastic, a little too good. I could have ran that truck for 16 plus hrs.
I don't drink, smoke and I avoid any habit forming activity (gambling, video games, golf..) and substances (except caffeine) all together. I do kick caffeine every once in awhile. So obviously I don't really think this product is good but if you must or are curious its worth the 3 bucks. But it is habit forming!
Also, the next day I felt a little down and I'm sure it was the 5hr energy shot. There is just no way your body/mind will let you get that out of whack with homeostasis and not demand a return.