the only Winny i've done is the real American shit from Winthrop (oral). in fact i'm running it right now. very expensive but i have loved it. i noticed being irritable and having a bit of a short fuse the first couple of weeks, but after that it got ok.
i also had a lot of pain in my shoulders the first week, but i kicked up my dosage of Gluc/Chon, stopped doing flat bench and the soreness went away.
i have experienced great strength gains, more than i really expected based on what i've read at this place.