Yah I think there's a lot of urban legend around the stuff. I know a few people who have used it (well, Brugmansia plants that contain it anyways) as part of their apprenticeships (Amazonian plant medicine, in conjunction with ayahuasca) in a more controlled manner and even then they have some wild stories about it (waking up naked in the jungle, covered in scratches with no memory etc). It lasts a looong time.