I never said it was safe just lesser of two evils by 95% (according to UK health policy). I can only go by my own personal experience, take it or leave it. It would have been impossible for me to quit any other way, my smokers cough went within a day, and I've not even had a cold for nearly three years. I am also saving $6000 a year and Doctors no longer give me crap!
PS: I also didn't put on any weight and I am not miserable!
PS 2: I am not going to get into the thing some people think is the cure to the worlds problems (420) but its not for me and its way worse to inhale than cigarretes. If your going to do that I certainly recommend eating it or vaping it instead.