I have had two workouts now where I took E911 on the way to the gym after taking my usual dosage of Maniac, and my workouts definitely had a huge boost! Maniac is not known to be a large stim but more for focus and such, so adding E911 gave me outstanding energy and motivation throughout. I was able to push more weight, or do more reps at the last weight used, on every exercise, which usually doesn't happen for me. I am definitely impressed with the product.
On a side note, I have only taken the product pre WO so as not to gain any tolerance to it, so far it is working great....and at a great discounted price!