Stay Alert... Not a bad product. Takes a while to get used to the taste and I can barely keep chewing it for anything more than 10-15 mins because the taste deteriorates rapidly.

But it does work. Do not exceed the recommended doses and even if you stay within the prescribed limits, you might notice some side effects (hands shaking, excessive sweating etc.). Still, it will keep you awake for a while.

I have no experience with Jolt, though.