Considering Hypnosis Quit Smoking Therapy

I have been trying to quit smoking for several years and have so far been unsuccessful.  I don’t intend to give up on my efforts though.  I have used the gum and patches several times and had no luck with them.  My doctor prescribed that new medication that has such a high success rate, but failed with that as well.  I have a co-worker that has successfully quit by undergoing hypnosis quit smoking therapy.  She told me that it took four sessions of hypnosis before she put down the cigarettes for good.  I think I may try this approach and see if it works for me.