I am using the products I won from the contest andis one of them. I tried one scoop at first and didn't feel anything. Two scoops made me kind of tired. Three scoops and I was sleepy during my workout. It seems every product I have tried with Nitrates in it makes me feel sleepy. So I don't know about using anymore products with nitrates in them. Sann's full impact 4350 has nitrates but it seems it has enough stims to counter the sleepy feeling. I still feel it, but its more of a "relaxed awake" type feeling. The taste of SuperSize I don't think is as bad as people say. It doesn't mix very well though, tons of power at the bottom of my bottle after mixing in a blender.