I've just started using one and bought this one at a recommendation from a friend: http://www.premiumecigarette.com/
I have cut back on real cigarettes but not as far as I plan to. Before I started these, I weaned myself off of regular smokes by switching to American Spirit brand - all natural tobacco without the 1000 chemicals put into most cigarettes. I went through nearly full withdrawel when I did that, which made it easier to go to e-cigs. Both American Spirit and e-cigs only have nicotine. The 1000's of chemicals added to most smokes is what is really physically addicting. If you go straight to e-cigs from regular smokes, be prepared to go thru withdrawl symptoms.
I have cut back on real cigarettes but not as far as I plan to. Before I started these, I weaned myself off of regular smokes by switching to American Spirit brand - all natural tobacco without the 1000 chemicals put into most cigarettes. I went through nearly full withdrawel when I did that, which made it easier to go to e-cigs. Both American Spirit and e-cigs only have nicotine. The 1000's of chemicals added to most smokes is what is really physically addicting. If you go straight to e-cigs from regular smokes, be prepared to go thru withdrawl symptoms.