That's amazing how different people are. I tried a couple of samples of Speed X3 and the second night I fell asleep with my then 2 year old while I was rocking him. haha Original Hyde I liked the very first time I tried. I had a sample. About 4 or 5 months later I gotta hold of 2 more samples, and they didn't hit me near as hard this time. Still good, but not the way I remembered it. haha I want to try Enhanced and Uncut. White Flood and PowerMax are not heavy on stims, but they hit me a lot better than high stim products. Outstanding focus. I have a high stim tolerance, so I wonder if that is my problem. haha