I worked for a manager that was hypnotized in order to quit smoking. It worked like a charm for about six months.

I went to one of those group hypnosis things that they hold at hotel conference rooms. It actually worked for someone I know, but after it was over I lit up in the parking lot, just about half-way between the exit and my car. Didn’t do a thing for me. The program does have a guarantee of sorts. When the hold a session in my area I can come back two more times for free and if it doesn’t work by the third time I get my 45 dollars back. I’ve just never bothered. I’ve never tried individual, one on hypnosis though. That might have a better outcome, who knows.