i dont even have to use it to know that its junk...
all this stuff does is dialate your blood vessels and keep water retention in your muscles...the moment you stop taking this, you`ll lose alottttt of size...
the proper way of taking this is by cycling it - then it oculd be effect. take it for 3 weeks, then get off it....2 months later, go back on it for 3 weeks...this will boost your strength and will give you a pump cut that most men want - it`ll just take a lil longer. Its the same logic as Creatine