http://www.gnc.com/product/index.jsp?productId=2651528 Anyone take this? I just read NO2 The 21 Day Transformation by Ed Byrd (It cost $1) and he obviously shits bricks about it. I searched here and didn't find much, and the reviews elsewhere via google aren't helping me decide either way. Not sure if it is worth the $50 for it. Is it better than no2explod? Or is no2explode more for a pump right before you lift vs. MRI Black which you take twice a day. I've never taken a NO2 supplement before so I'm not sure what's what.