I experienced this with Jack3d as well, to the point where I was about to get some and I had to make an excuse about why I had to leave because for the life of me I could not get hard. Grabbed my clothes and headed for the hills. Talk about a ruined night. I switched to Super Pump from Gaspari and have had no problems like that since.
ohh your dating my ex? cool. I'm eating a sandwich, do you want those left overs too?