The company i worked for requires a yearly physical, during which, every other year includes a lung function test. My test in March of 2011 showed i had the lung function of a 47 year old. i was 30. i had been smoking for 12 years. i started using an analog e cig Nov 11th, 2011 and was able to completely stop smoking and dipping almost immediately. fast forward 2 years, my test result in March 2013 showed i had improved to 109% lung function. any and all things that are positive about quitting smoking have happened. i can feel the years being added back to my life.