Yes. During the two years leading up my trying e-cigarettes, I used Zyban, the patch, and nicotine lozenges. The lozenges were the most effective of the
three, but my Cappucino Nicotine lozenge addiction was more expensive than my cigarette habit (and, baby, that's saying a lot!) and I gave those up and returned to smoking.
In October, 2011, I bought a disposable e-cigarette, and that was the end of cigarettes for me. Haven't smoked since, don't even miss them.