Here is what the program here says about Hypnotism, to find out more information on quit methods check out Session 3.
Hypnosis
What is it? Hypnosis therapy is designed to help you focus on your nicotine consumption patterns and to change your attitudes about smoking or chewing in ways that will help you quit. Hypnosis often involves 1 to 4 hour sessions and may include the development of a personal program tape to use at home after or in between sessions.
How does it work? While you are hypnotized, the therapist gives you suggestions to help you stop your nicotine use. The procedure may help with relaxation and withdrawal symptoms.
What else should I know? Your chances of quitting after just one hypnosis session are low, but may improve with multiple sessions. However, there is little evidence that the hypnotic state helps people quit above and beyond the suggestions provided by the therapist. In addition, hypnosis can be both expensive and time consuming. If you choose this method, be sure to check the costs, time commitment and your therapist's qualifications.
I'm sure members will be along shortly with their experiences.