Smoked for 15 years of 1 pack a day…. Stopped smoking (cold turkey) on January 14, 2013 due to sudden pain and tightness in my chest… Started on electronic cigarettes/personal vaporizers… Up to date, i never had smoked 1cigarette… Not even 1puff of it… That pain and tightness on my chest never came back… I have not experienced any ill effects or any adverse reactions from the use of my current electronic cigarette… To this date, i have not experienced any negative effects from the electronic cigarettes… Better endurance when i play my sport hobbies, my car does not smell bad, my mouth does not smell bad, I do not get easily tired (almost in all aspects), i feel like i can breathe better, my boss is happy, my friends are happy, my family is happy, i am happy that i do not smoke those cigarettes anymore…