Twice, legally bought standardized in powdered form from an online smartshop. I found it less severe than psilos, more mellow, not very visual (but I had difficulty with getting visual hallucinations anyway). At one point I fell asleep and it reached the level of a waking dream. Woke up all sweaty. Back when I did it (around 2005-7), the smartshop had an OK website, and there was Erowid.