There are many types of sust out there. Specifically there are two types of Organon Sust 250.
Nile Company Green etching - Made in Holland?
Karachi - Yellow etching - Made in Pakistan
I've used both and don't have a preference. Sometimes the Karachi is a bit cheaper than Nile, put it's the same blend either one.
You should not get impotent from Testosterone -actually quite the opposite. However without proper PCT (Clomid/Nolva/HCG) your libido will bottom out (crash) and your sexual drive (manhood) will be a thing of the past.
Is this your first cycle. If so - use the search engine on this board to your advantage.
No, in fact the opposite is true, youll get increased sex drive.
Impotence only can happen if you use it nonstop for several years, so your body stops producing testosterone, and then you stop using steroids.
B. The same sustance, sold in different markets