I smoked for 45 years and tried all of the quitting aids and always returned to smoking I even tried cessation groups and hypnotherapy. Three years ago I started vaping with the pens.I continued smoking for about 1 month and when I finished the pack of cigarettes I realized I didnt need them. I was vaping 36mg. I have since gradually moved up to mods and rebuildable cartomizers and slowly reduced the nicotine. I now am vaping 3mg or 0mg. I still enjoy vaping for the habit developed over 45 years of smoking, but I can breath much better and have more energy.