got a couple samples of this new C4 Ultimate and enjoyed them immensely. it has maintained all the strong points of the other versions and has really bumped up the energy levels. 1 scoop of C4 Ultimate is sufficient for me to have a great workout of an hour or more. im normally a 2 serving Pre person so this makes C4 Ultimate really cost effective. the Orange Mango flavor wasnt my favorite but it was quite drinkable. if youre a stim lover, C4 Ultimate is well worth checking out!