I have smoked for 35 years. I have tried numerous times to quit by every method possible, medication, patches, cold turkey, acupuncture, hypnosis gum and lozenges. The longest I ever lasted was 3 months prior to using electronic cigarettes. I have not smoked for over 5 months now thanks to electronic cigarettes! I started out by smoking the electronic one during the day and regular cigarettes at night for 5 days. After that I only smoked the electronic cigarettes and started out at the high level of nicotine. I am down to the medium level of nicotine (switched after about 3 months) and plan to purchase the low level on my next order. I feel great! I can breathe better, the dark circles under my eyes are gone, I can smell and taste on a level I have not since I started smoking. Do they deliver nicotine? Yes they do, so do patches, gum and lozenges. Do they have the carcinogens and other toxic chemicals that regular tobacco cigarettes have? No way!!! Iƒ??m not sucking in carbon monoxide and other harmful toxins. Regards, Kathryn Lafferty