I think these new electronic cigarettes (e-cig for short) are great. They are not advertised as a 'quit smoking' product, because they aren't for one, and for another, they would have to be approved by the FDA if they were. The websites that I see dedicated to this aren't concerning quitting smoking, but changing from smoking those unhealthy analog cigarettes to smoking these "no carcinogen" cigarettes. The pros of switching, based on anecdotal evidence are:

• Improves lung function.
• Improved sense of taste.
• They smell better, pleasant even.
• You don't stink after smoking these.
• You can smoke these where smoking is banned. (Scottsdale, AZ comes to mind)
• No burning, so less fire danger.
• No ashes, so they are cleaner.
• Cheaper per smoke than buying a carton.
• Better variety of flavors (cola, toffee, strawberry, chocolate, malbo, mint etc).
• Only nicotine and propylene glycol - no carcinogens.
• The "smoke" (actually just vapor) does not hang around in the air.
  

Anyway, for $35 a starter kit, it makes a good gift for friends who are smokers. Still, I wonder if they could help you lose weight like smoking does. Probably not since it won't ruin your sense of taste.