Don't know anything about them... but I do know two people who have quit.

Both just quit. For one person, they 'quit' twice before finally making it.

The other person, my mother, quit one day just like that. It was after a very disturbing doctor appointment - he got thru to her in a very cold manner, but it worked. Oddly enough, Mom told my sister that "I am NOT going to let this bother me, if I can't handle not smoking, I'm gonna go back and smoke again." She kept cigarettes in the glove box of her car for about a month until she finally determined that she had, indeed, quit.

She never smoked again - she was in her early 50's at that time.

I think quitting "cold" works best, but it helps when the doctor tells you to your face what you are headed for. I don't believe that smoking shortens your life (at least, not very much) - but what it DOES do is take your quality of life away in the later years of your time here on earth. I really saw that with my parents.

Getting back to mom: The power of one's own mind is amazing. Mom's mind overcame the TERRIBLE addiction of cigarettes, and she did it by NOT being so awfully determined. You know, they say you have to be strong, confident, etc. Mom wasn't. She just said she'd try it, but if not smoking drove her nuts, she'd just smoke again.

But, like I said, she never, ever smoked again. Well over 20 years and she never smoked again.