in for the difference between this and peak atp. I do like a nice basic stand alone product and do have some myself and am currently using. Added to creatine mono and cbol, less than a week in, do notice nice pumps in gym (could be cbol) and some strength and endurance (all things should note from creatine). I have a feeling this product will end up being a nice add-on to creatines and pre wo's as long as price stays low. Still early though, and it is not like a stim, so not something that will "feel", more so see in progress. My initial thought is that may help creatine effects kick in a little quicker.