I have not tried it. I doubt that it acts as claimed. It is mighty hard to get a drug with a real effect on performance. Most performance enhancing drugs (like steroids) are potentially dangerous and often are only marginally effective. I would wonder how this stuff is supposed to work. Some drugs have valid mechanisms - epogen stimulated red blood cell production. More red blood cells, more O2 to the muscles - more aerobic performance to the muscles. It does have a mild side effect - it can raise the viscosity of the blood causing catastrophic heart failure.

I would think that this stuff is probably ineffective and it ain't cheap. And there is no way that you will be able to outperform Armstrong using it (otherwise the rest of the propeloton would be scorching Armstrong and they are not are they?). If it is effective, it probably has potentially dangerous side effects. Is riding a little faster worth that?

Look, with proper diet and training, a fit recreational rider can do things that verge on the super human to a non cyclist. I was talking to a guy yesterday. He was astonished to hear that I considered 50 miles to be just a middle distance ride. The way I am doing things, I know exactly what is going into my body and what it does. I don't need to full around with weird additives. There is no way I am going to get replacement parts if the additives wreck the system.