First of all I am not one of these guys on here who do nothing but bash Muscletech products...I have had some success with some of their stuff when I do buy it...(although I will agree with the bashers out there that their products are way overpriced!) However I used the Nano Vapor Nitric Oxide product they recently put out and man, it tasted good, but I couldn't hold an erection to save my life afterwards! I took it for about three or four days and during that time I tried to bang my wife three times and couldn't maintain an erection. Now maybe the product works TOO well and has opened up my blood vessels to the point where blood is leaving my penis instead of pooling there like it's supposed to. I do remember now having this same problem also about two years ago while using NO Explode. Anyone out there experience the same thing with these Nitric Oxide products?