Very, very cool, for what it is. After about 7 minutes, I begin to see fairly interesting evolving kaleidoscopic patterns that are in my mind, and not actually on the screen. I'd like to go further, but the sound stops randomly after 3-7 minutes, which is the only thing seriously limiting my enjoyment of it.

Of course, this has very little in common with a real psychedelic experience. It's more trance-like, and somewhat meditative, which is still neat.