I did zyban when I quit the last time and it worked amazingly. And yes, the last time, as years later, I started again.
I first started smoking when I was 12, and smoked right up till my mid 20's, then off and on till now, I'm 49.
Started again 7 years ago after my separation/divorce, (depression and alcohol didn't help) after 6 years of not smoking, it's that easy.
I'm feeling the time is nigh to quit again.
And I wouldn't hesitate to use the zyban again. Now, the fine print... I was ready and willing, and had several reasons, health and otherwise, to quit, so it was easy.
I tried zyban once in the last 6 years cuz "I should quit", and it was a failure.
If you're in, it's easy, if your not, it's hard.
And to all those that say the first couple weeks are hard, they're easy, it's the next 10 years that's hard.