I've got some Nile sust and some Nile Primoteston. I'm wondering the same thing. My doc has prescribed test injections of enanthate at 250mg per month. So far I've had one injection from the doc, and the sides, and the pumps that would go along with it disappeared about the time one prescription injection would have worn off. I continued using the Nile products since then.
I'm going in tomorrw or wednesday to get another shot of the real stuff from the doc. I'm interested in seeing if I notice any difference.......
I'll be glad to let you guys know.