By J. Privatt - Published on Amazon.com Ive had this CD for close to 2 years now. My wife and I listen to it every night (on repeat all night) and really miss it when we are travelling or forget to start the CD before going to bed. What weve really noticed is, while it does help you sleep if you are having a bit of insomnia, where it really shines is the deepness or quality of sleep. When we sleep without it, it is as if we had been out sleeping on the hard ground. We got a good nights sleep, but just not deep, quality sleep. It is hard to describe (wish they had put a sound clip or two up) but there is no melody or beat; the music slips into the background and you are completely unaware of it again until you awaken - you dont dream about the music itself. We tried a different CD the other night and it just isnt the same.