I recomend naNO Vapor over NO Xplode. There is no loading process with naNO Vapor, you take 1 scoop and very slowly build from there, not 3-4 scoops a day like NO Xplode and as if that wasn't already good enough, you don't take naNO Vapor on non workout days.
It's much more powerful than NO Xplode, I was using NO Xplode and went into GNC to restock and was talked into buying naNO Vapor, the store clerk was taking NO Xplode as well and said naNO was much better, and it is. The very first time I used it I noticed it's potency immediately. It kicked in within 5-10 minutes and I was in psycho mode, tearing through weights like I was never able to do with NO Xplode. For me, the difference was unreal.
I am lifting heavier weight than I was with NOXplode and am able to run through stations with very little rest inbetween and my muscles do not tire much at all. It's been a huge step up for me, it took me over a month to even get to the point where I was taking 2 scoops.
If you're using NO Xplode you may want to finish off the container and then get some naNO Vapor, it's a superior product.
Dana White - "Fedor is a farce"
Fedor - Destroys Sylvia in 36 seconds