It is amazing.
I have been playing it for my all-boys-room at bedtime. Bedtime used to consist of me tucking them in, telling them to stay in their beds, me walking out. Several minutes later, I would hear banging, jumping, fighting, laughing. They were just having trouble winding down.
Enter this CD.
I can't say they are perfect (well, I could, but you would know I'm lying), but the bedtime routine has greatly improved. They may talk a bit, but for the most part they just lay right down and listen to the soothing music.
Click on the link- they have samples to listen to. I highly recommend it!