As a smoker using e-cigarettes to wean myself off the regular ciggies I would say that they are much healthier. When using the e's my throat and mouth are not so dry and you don't have an awful taste in your mouth.
I was interested in what mvaivata said about her friends. The strengths can be very weak if you buy the lowest dose of nicotine, but you should be able to buy much higher strengths to ensure that you don't suffer withdrawals.
All in all I would say that they are worth a try although they might not work for everyone. Firstly you do not inhale the millions of various chemicals as you do with ordinary cigarettes and this is not a problem as it's only the nicotine that's addictive. you don't inhale or breath out any harmful smoke. Some of the e-cigarettes do have smoke like an ordinary cigarette, but this is harmless and has no odour.
One other thing I would say, is to please watch where you buy your e-cigarette kits. There are some excellent sites but there are others that people seem to be having problems with the kits working. I would read the customer reviews before purchase. Hope this helps a bit.