Am I missing something?

I think it's called the "placebo effect." This device or its predecessor, was introduced about 12 years ago, and was duly noted by the reviewers. Needless to say it never caught on . . . . .I wonder why.

Have you considered one of those "magic chips" to put on top of your CD player?

The real issue is does it work? How it works, if it does, could be scientific (physical) or psychological (metaphysics.) Science-based devices work better for me, because I can relate to that kind of "how." But I'm perfectly willing to accept that some folks operate on a different "plane" than I do, and to recognize that suggestion can be a very powerful thing indeed.