My wife and I have been using e-cigs for about 3 years now. Basically, you get the nicotine and 'smoking' sensation, but none of the carcinogens. If you can't manage to quit, look into the 'Joy-e 510 ego' or the 'Puresmoker Legacy' as an alternative. It's cheaper and much less of a health risk than traditional cigarettes.
i have an e-cig, but all it manages to do is make me want a real cigarette. so that's counterproductive, i get extra nicotine and cancer!