I was a on again off again smoker for years. I never really wanted to quite smoking. I liked smoking (or so I thought). I decided it was time to quite again knowing how bad it was for my health. My sister sent me her e-cig that she successfully used to quite and no longer needed it. I was off analogs in a week. I liked vapeing so much I kept using it (unlike my sister). I started to notice the usual quite smoking effects like my sense of smell coming back (not a benefit). My skin looked brighter, and now I can actually run! I can hike up the hill without getting winded. I have done much research on the web and realize there is the unknown of the long term use. With anything only time will tell. For now I am one happy camper!