I used some stuff back in the day. While I experienced incredible strength gains, it didn't really do shit for my physique. I just looked like a guy who worked out a few times a week to stay in shape. Of course, I'd kill to have that 'shitty look' today, but that's a separate, old man story.
Very little bang for the buck, so you'd be better off getting the real shit.
Note: I am not suggesting that you break any laws.