I have been smoking for over ten years now. I had tried quiting previously cold turkey with no success. I tried some of the cheaper e cigs bought from gas stations and never really stuck. I had a friend who had smoked for years and started using the better quality e cigs and was able to drop the habbit with using them. I had been thinking about it for a while and finally decided to buy a good quality e cig. The first few days i used both the e cig and conventional cigs. after the third day i only craved a cig when i was driving and a few days later i didnt want them anymore. i threw away half a pack and swapped completly to them.after a few weeks i noticed that i wasnt losing my wind so quickly. i also no longer awoke in the night coughing and wasnt hocking up nasty brown stuff in the shower in the morning. i dont know if its healthier for me or not but it definatly makes a noticeable difference.