Personally I had a very bad experience with Zyban. After about 6 weeks I definitely had stopped smoking but had also developed weird motor tics and even a Tourette's-like involuntary grunting. Pretty soon I was hallucinating so I wound up checking into a hospital and they thought I was nuts. I think my main problem was persistent lack of sleep by that point due to the twitching.

Things were fine again after I stopped the drug. But then I started smoking again. The only thing that worked for me in the end was cold turkey. Haven't smoked in over ten years.

Thanks for the post, glad the Zyban worked for you.