I had been smoking for forty five years, got up to three packs a day. I had constant headaches, wheezing, all the good stuff. Diagnosed with CPOD, and still kept on. My lungs would sound like cellophane cracking and popping when I laid down and night and I would cough all night. Wake up in the morning and before I even got out of bed, light up a cigarette. A good friend of mine suggested e cigs and told me about his buddy that was sucessful in quiting using them. I had tried many many times to quit using the gum, patches, counseling, drugs like Welbuteron, Chantex, cold turkey, all to no avail. So what the hell, I tried everything else. I got an order on line for disposable cartridges and a rechargable battery. It was a pretty fair substitute but the cartridges did not last as long as advertised and the batteries were even worse. I did some research online and found a cigarette forum, E Cig Forum that had a lot of good information for a beginner like myself. I found longer lasting batteries, all kinds of tanks and cartridges I could fill myself at a lower cost. Then the madness took over……. I got into mods and making my own e juice. I made repairs to my tanks, wrapped my own wicks, rewired. It has been a fun hobby and a learning experience. I have helped many people, including my own daughter and her husband quit smoking. All in all, I would say the e cigarette is the best stop smoking tool ever invented, and thank you to whom ever came up with it. I may even live a few more years now.