Hypnosis Marketing - Any solid proof?

I have come across quite a few sites mentioning hypnosis marketing most of it seems to be with sales letters and articles and just really seems to be about writing it out in a certain way with open ended questions etc.

It seems to make sense and I am sure professional people who have studied how our mind works will be easily able to sell us stuff much better than an average sales pitch.

What do you guys think and do any of you implement it?

Yeah does it work well? i mean i've read alot about it but never really implemented it because i didn't know if i would be worth the try.