Has anybody tried Tomatis therapy?

Has anybody tried Tomatis therapy? My relative takes his kid with brain issues to this [clinic](http://www.atlantis-vzw.com/home.html) in Belgium and swears up and down it's really improving kid's condition - he immediately started to speak better and responds to stimuli better. Apparently they also treat people with stutter and seem to have positive results. Has anybody heard anything about this method? Normally I don't believe this kind of things but when family vouched for them I got interested.