Hi.... I smokes about a pack a day for 10 years, and quit about 4 months ago. It was ironically my worst bout with symptoms at the time, but for some reason, I picked that time to try. I used to think that it calmed me to smoke, and that I would have really bad withdrawl symptoms when I quit, but it was just the opposite. I quit cold turkey, and I feel alot better. I swear, I won't preach, but give it a try. You really won't miss all of the pros it had. I never thought that I wanted to quit, but I did, and believe me, I am so stubborn!