Tried this for the first time last night at the tail end of a MDMA experience.I couldn't believe how quickly I felt it come on, like 5-10 minutes. This was 20mg of the fumerate salt oraly in a gelcap. A first I thought it was placebo affect but my girlfriend felt it also and once the effects were fully established it was obvious it was the drug we had felt so quickly. My experience with 4th position substituted tryptamines (this and 4-Aco-DET) is that they are distinctaly different from 4-HO-DMT (I have only experienced this through mushrooms, not in its pure form). I have yet to experience 4-Aco-DMT but I think I would find it noticeably different from 4-HO-DMT although many researchers say they couldn't tell the difference. Anyone here have experience with 4th position substituted typtamines? How do you think they compare with mushrooms, or if you are lucky enough to experience 4-HO-DMT that?