For those who want more info from actual users, I see amazon.com lists the item, and it has about 9 reviews from customers. Most rave--a couple of the reviews cited problems.

I just might give this thing a try. Regular headphones, earbuds, etc., are extremely uncomfortable and actually prevent sleep for me. I also don't have much luck with "pillow phone" types of devices, since you don't get the benefits of the Holosync and/or paraliminal technology.