I'm immediately suspicious of anyone whose website is just like 'Give me your email address so I can sell you shit' with no evidence or anything convincing. The name of his 'method' suggests he may have a way to help you express your authentic self which is surely the ultimate goal of overcoming stammering. But from experience, figuring out your authentic self and learning to express that can take a hell of a lot longer than the 6 weeks he promises. I'd be interested if anyone has any experience of this guy's method, though.