Balkan is not Pharm grade. My experience is minimal. I've used a couple vials of Balcon Masteron. It seemed to work just fine more me. After that experience, I would say that I have more faith in them. I'd be willing to try more of their line. Still, If I have the choice, I will stick with Geneza, as they have always treated me well and given the effect I wanted. Never felt that GP was underdosed or at a different level of strength from a provious batch. I like GP for quality and for consistent quality