So Far It's the Best Pre-Workout I've Tried, I've had others, Been from Nasty Taste to Just plain Horrible, I started taking regular BULK, I liked it, my workouts were great, so I decided to try BLACK, Now this is a great pre workout!!! The taste is the best I've had among the others that I have taken and the results are obviously noticeable,, but not in a slap you upside your head way, you just don't want to leave the gym, I find myself sometimes looking for another exercise to preform, but i have to make myself leave once i get over two hours, I have not experienced any nasty after effects, no headaches, tummy aches, just pure clean workout energy. I love the stuff. If you see a flavor you like I suggest get it when you see it because it wont be there the next time you look, at least that happens to me, I like the Black Cherry and I'm trying the Cherry Kiwi in the next hour, I'll come back and let you know.