If any of you guys want to get an idea of what your mind flows like when on them, I suggest you find some videos (or audio) of Terrence Mckenna.
He is probably one of the only guys that can take you into that state, SOBER, if you really listen to what he is talking about. He was able to synthesize and "truly bring back" in a non-psychotic manner what an altered state experience can do for your evolution.
Terrence Mckenna........check him out......no other like him will probably ever exist in our lifetime.
His Time Wave Zero is VERY interesting if you can follow......