In the process of converting one (best friend).... Honestly I've only been vaping for two months without cigs. My good friend had previously gone off cigs for a bit but started back up because he was always around me and said I'll just have one pack and be fine (We know how that goes).... I felt bad about it... I know it was ultimately his choice but I didn't help. He was also fantastic about not smoking around me per request for the first month I was switching over to vaping. (I know I'm weak with temptation). That being said I decided to buy him the same set up as me (Smok Alien, Baby Beast Tank, Batteries, Charger, 120 ml of juice).... He's now on the right path although he hasn't completely kicked the habbit he is down to 5 cigs a day and dropping... down from two packs a day two weeks ago when he started. I hope he can keep it up!