WarpMyMind

Well, I haven't really tried a lot of the files, but I have tested a couple because I was curious to see how they worked. SuperHumanMind was the first file I took totally seriously. I tried it for the first time last night, and I felt some changes, but none of the effects that it described. Does anyone know how long it takes for this file to begin taking effect? and Are there any long term repercussions of listening to this file or any file, for that matter?