ok, so I've only tried it once so far, but my 3 week old boy likes to howl in the evenings, and not much will stop him usually. So after trying all the usual stuff, I remembered his grandma had bought us this CD. I put it on and within a few seconds the howling stopped! I couldn't believe it. As it continued to play, his eyes started drooping and eventually closed altogether and he was away with the fairies.
Now, obviously, every baby is different, and every situation is different, so I'm not expecting this to work on him every time, but it's not expensive so just give it a whirl!