The rockstar energy juice is one of my fav energy drinks, along with the monsters. It is just like any other kind of energy juice. It tastes pretty good. The energy it gives is also very nice. Physically, it is very refreshing and works some sugar into your body, to give you more energy and sap away the tiredness. Mentally, it is very good for increasing concentration and focus, and just to wake you up or keep you awake, whatever your needs are. The thing i like is that the energy is not too much of a overload like redbull, it provides some sustainable, slow acting energy. It is not the strongest, but i think one of the best.