I've tried it before, and really liked it. Didn't really gain much, but damn, it made my veins pop out and the muscles held the pump for much longer throughout the day. And I wasn't even that lean at the time.
I'm going to be ordering the Pinnacle NO2 supplement in another 2-4 weeks. I've heard the stuff is pretty badass, but I'm on a diet right now and it's working, so we're going to see how far I get in another month before I change up things.
I have been on NoX2 by Pinnacle since Saturday the 20th. Yesterday 2/23, I was able to feel a difference in the Gym I was working out legs that day. I can honestly say that it has given me the feeling as if I was back on the juice. I still am waiting to see if it helps with the recovery/ repair of the mucle tissue. My muscles feel like they are so full of blood that they are going to pop when I'm lifting. I will let you know how I'm doing by the end of the week and let you know if I feel in negative side effects.