1.it cheap and clean,saving the smoking cost 80% per year
2.no tabacco,no tar,no real smoke and the nicotine is much lower than real cigarette
3.dont need to wory about the smelly mouth and yellow teeth
4.no cancerous subsances( there are approx.40 cancerous substances in real cigarette)
5.no harm to the around the people
6.no horrible smells and no air pollution
7.no ignition and no fire hazard
8.no astrays and no cigarette butts
9.working on rechargeable batteries  

one time invest , benifit all the time