I smoked for 40 years I started using the e-cig 7 months ago. I started with a spinner twist battery and 24 ml of nicotine. I have not smoked a cigarette after 3 days of using the e-cig.I tried everything before the e-cig, meds therapy behavorial conditioning acupunture and nothing worked I was back to smoking in less then a day.I have not used my inhaler which I used twice a day and house does not stink or my clothes. I am saving a ton of money and I can breath now smell things and overall have more energy.I have already cut the nicotine in half down to 12ml. I have not found anything negative regarding the e-cigs.I never thought I would ever stop smoking cigarettes. This has changed my life. I can say I will probably keep vaping even when I have no nicotine I enjoy the flavors and the taste.