What ive read, its purely a placebo effect on the users who reports that it "works". I did the "trip" sound file wich is 30 mins long, while i was listening to the sound i pretty much got into ha hypnosis/dream state, and i was like "hmm it might work" but as soon as the sound file was played i didnt feel a effect at all.
Alltough i was amazed that i actually had listen to it for 30 mins, in my perception i had listen to it for max 10 mins in total.
Bogus for sure.