I smoked for 30 yrs over that time I tried everything on the market to quit. When I switched to e-cigs and now a eGo battery and tank I stopped regular cigarettes in two days. I just couldn’t smoke them anymore. I’ve cut down on smoking and use 12mg or 18mg in my tanks only and in my regular e-cigs. I’ve been smoke free for one year as of 7/27/12. I’m very happy as is my family and regular doctor. I’m glad I made this choice and will never go back. I know this works and is the best thing I’ve ever done for myself. I am happy I’m vaping a few ingredients instead of smoking regular cigarettes that have over 4,000 chemicals because I have felt better since I switched.