A lot of people have success with it. I often find that I'm more successful on days when I've listened to the meditation the previous night. That said, although it seemed to work almost magically at first, I haven't since had any long stretches of effortless control. On the whole, I think it can do the trick for some people and can be a useful tool for most people.
Onederland by July
Live in the sunshine, swim the sea, drink the wild air. ~ Ralph Waldo Emerson