This course certainly worked for me
I did the 4 hour course at Joppa Edinburgh back in 2001. A very entertaining experience and I have not smoked since. I started smoking when I left school in 1962 and smoked continually until I did the course on 7th April 2001. I have not smoked anything since that date. May I add that I was Merchant Navy for 47 years with constant access to duty free tobacco goods.
This course certainly worked for me.