I was a pack a day smoker and smoked for 5 years. I also used hookah on and off. I quit using electronic cigarettes. Nicotine gum and Chantix did not help me. After trying them on and off for 2 years. After switching to a Vaping I was able to immediately stop smoking. Lung function and that nasty smokers cough went away after using a vape for a month or two. I have used a vape since and brought my nicotine down to using 0mg Ejuice mostly.
Vaping was the reason I quit.