Update: Biggest difference I see is endurance and energy throughout my workout. I did legs tonight and I can say that I felt mch better than I usually do during a leg workout. I actually got through the sets withouth feeling like I was going to die (which I usually do lifting legs). Strenght was up (increased reps mostly) and energy throughout the workout was great. Anything that helps me with a leg workout is gold in my eyes. I am liking this prodcut so far. Pumps are still there and I definelty feel slightly fuller. We'll see as time goes on.