I smoked at least a pack a day for the last 10 years and sometimes more. I have smoked off and on for over 15 years. I bought an E Cig and have not picked up a cigarette since. Its only been about a week but I am amazed at how easy it has been. I had a complete panic attack when my husband said he wanted me to commit to one week of trying it. I feel 100% better already and have gotten my dad to try it and he is having same results.