As far as the ingredients are concerned I really like the combination in the Lean and Mean stack. I was already taking many of the ingredients so switching to the stack made it easier for me. I noticed right away I wasn't as tired or needing to nap as much. Progressively within the first month on the stack my gains increased insanely. I was looking to cut some body fat which I have definitely done around the waist line. Thanks Crazy Muscle!