This discussion is several years old, and we still don't know whether vaping is harmful or not :) What I can say for sure is that my vape pen helps me to quit smoking. I haven't smoked any nicotine cigarette since I've started vaping, so it really works for me. Of course, many people (mostly non-smokers) think that vaping and smoking are both bad, but I can't agree. I read several articles on the topic (by the way, there is much interesting info on a vaping daily site), and I decided that e-cigs can't be more harmful as tobacco. Another question is how addictive vaping is. Here I don't the answer, but I guess, time will show.