yeah it's pretty close to winstrol actually, but a little milder in sides/effect milligram for milligram, and no it isn't a prohormone, it's a full-blown anabolic steroid, just like winstrol. it deserves the same respect as any other oral steroid.
i've taken it, it works, it's legit. don't expect to get big, just some added size/strength and some cuts if you're already lean.
(can you drink epistane? lololol)
i'd suggest an injectable if you can get your hands on it.