I wanted to get some opinions on Nitric Oxide supplements people have been using. I have tried NO-Explode and Nitrobolic Extreme by Vyo-Tech. I seem to respond well to both of these but I really don't care for that anxious feeling I get when I am done working out. It feels great when I'm in the gym but the buzz usually lasts many hours after that. Are there any products out there that don't give you that minimize that feeling? What about Pump-Tech? Has anyone tried that?