JJC, I am guessing Dirk is typing a reply this very moment. Yes, part of the "energy" one feels is due to the chocamine, caffeine, naringin combo.
But, this same interaction cannot explain the motivation, drive, intensity, and aggression that also comes about during use of RPM. These are the benefits that set the product apart from the field.
There are tons of pre-workout energy boosters on the market. RPM is not one of them. It's in another category, right above the rest of those This fact is displayed not only by feel, but also by the changes in body comp and appearance.