Update: My wife has made the change from standard cigarettes to e-cigs (which I am treating as a positive step and on the road to her quitting). Based on the research that I've done so far, the elimination of her inhaling the particulate smoke and additional chemical additives in cigarettes is a profound improvement. Also, it appears that she has the ability to meter (and decrease over time) the amount of nicotine in the e-cigarettes (similar to the "step down" dosages of nicotine patches). Though my research on nicotine itself (when put aside from the other known carcinogens in tobacco smoke) is that it is a "mixed bag" of stimulant, addictive, beneficial and harmful effects. I can say that things certainly smell better without ashtrays or smoke around. Does anyone else have any personal or second-hand (pardon the pun) experience with "vaping" or e-cigarettes in general? I am still eager and interested to learn more.