I took chantix and for me it was the "miracle" I'd been looking for. After 35 years of smoking, and up to 2 packs a day, and multiple tries to quit using NRTs, welbutrin, etc, chantix really helped. I took it according to directions, and haven't had a single puff in over four years. There's a good thread about "weaning off chantix" that can give you multiple perspectives on people's experiences with it. Probably worth checking out.