It depends on your personality/spirituality -- and how much you do at once.
I've done it a couple of times and I don't feel the need to ever do it again. It was enjoyable and beautiful. But enjoyable and beautiful is what it was for me. I got Jesus and am a grounded person and trips don't go bad for me. It also was a detoxifier in my case. I came out of the trips super sweaty and not wanting to put anything into my system other than water. (Cigarettes and alcohol just sounded awful for once!)
It did not change the way I think, then again I already knew this was a multi-verse guided by a divine matrix.
A friend tripping with me, before he toked said "I want to go see aliens" to which I replied "I'd rather not visit with demons, thanks" and the shaman seemed to agree. If you do it - get a nice image in your head...I wouldn't go looking for trouble or trusting too much advice from who you run into "out there." And remember, everything in moderation. I knew someone who started making it, got hooked, and turned into a violent a-hole.
it looks pretty awesome.