I quit at the beginning of 2005 using Zyban. I couldn't believe how easy it was(after trying numerous times over the past 20 years and never lasting longer than a few stressful days)....but by the end of 2005, because my hubby and all of our friends still smoked, I started having the odd one on the weekend when we would have a few beers. My "excuse" was, I only have a few when I'm drinking....which lasted for awhile.
Then, slowly, it has progressed to having one before bed during the week as well(to wind down from the day), to having a couple in the morning with my coffee, and to having a couple at lunch.
Basically, other than smoking in my car(which is new and I refuse to stink it up), and taking smoke breaks at work....I'm right back at it again.
I keep telling myself that when my husband is finally ready to quit, I will do the Zyban thing again and kick the habit once and for all. It's tough, really tough.
You hang in there and keep it up!!! You're doing great.
LIG