I have been a fan of Dr. Thompson for a few years now. The music is really nice however, some of his music literally causes me to have health issues. I cannot even hear the Gamma Meditation System 2.0 because my ears begin to thump, and the Awakened Mind System 2.0 gives me splitting headaches. The only music by him that I can listen to without an issue is the Creative Mind System. It is curious that all the ones I cannot tolerate have the 2.0 version after their title. Perhaps Dr. Thompson will look at this review and start a research on how his music affects the brain.