At least e-cigs are simply only nicotine (in propylene glycol in order to produce the mist / smoke). Nicotine, a stimulant in low doses, is not really good for you. But the extras involved in smoking dried organic matter are a whole lot worse.
If the choice is between e-cigarettes and regular ones the e-cigs will be an order of magnitude better for you. Expect to see these approved for smoking cessation therapy by the FDA in a year or so, as you can have a metered dose of nicotine delivered and slowly lower the dose in the cartridges you buy.