I have a friend at my golf club who has smoked all his life, and he went to them about a month ago. He says they have as much or more "kick" than regular cigarettes, but there is no smoke or smell to bother non-smokers. And they are certainly more economical than paying the current prices for the real thing.
Another friend in Dallas says basically the same thing.
I never smoked so can't give advice about quitting but I know it's really hard from watching friends fight it.
I think the electronic ones are a replacement for smoking cigarettes, not an aid to stopping.
DonM