I bought an electronic cigarette with the idea that I'd replace smoking with it, and it worked. I've only had one urge for a smoke, and that was more of a location issue (just finished eating, wanting to go outside to smoke). Puffing on my e-cig fixed the craving quickly.
I started out with a medium solution of liquid nicotine, that's 11mg and have now gone to low 6mg. I cut that down even because I mix my own flavors from an unflavored nicotine base so I would estimate I'm at about 3mg.
I could probably go to a no-nicotine solution with no problems, and I think I'll do that as soon as I have a free mixing bottle handy.
For me, I think, the hand to mouth habit was a large part of my addiction to cigs...and the electronic cigarette gives me that. It also gives me the feeling of inhaling smoke and the whole "smoke thing"; blowing it out etc.
Anyway, I'm thrilled with it. No ashtrays in my home or vehicle. No smoke smell.
For those who have not heard of them,
E-Smoking 101.