Now i am 4 years in vaping and im using zero nicotine, but in my first time use i use 6mg to satisfied my self not smoking tobacco. But like others user im not control my self so from 10 to 15 sticks per day im smoking tobacco once a day.when im craving to smoking tobacco i use may electronic cigarettes so my craving in nicotine is going to switch vaping. And now for me electronics cigarette is a device to reduce your smoking tobacco habit and help you to remove it someday.