I am a smoker and recently used my friends e-cigarette and decided I must have one. I went out and bought one and have been using it for 3 weeks. I have went from smoking 12-15 cigarettes a day to 2-3 cigarettes a day. My health already feels much better and if nothing else I am saving a boat load of cash. Definitely worth a try if you are trying to quit smoking... Gives us smokers 2 things that are the hardest to give up... the habit of holding a cigarette and the smoke factor.