Varenicline
"I hesitated to try Chantix due to the side effects.  But I had some minor health scares and knew that my luck would run out soon.  I really didn't want to quit smoking.
I started Chantix 9 days ago.  I smoked my last (hopefully) cigarette 6 days ago.  I know it's very early in the quit process, I've done this before years ago.
I've had no adverse effects from Chantix.  Quitting has been one of the easiest things to do.  Yes, I still have the urge to smoke at times but it's more the habitual urge. The cravings have been less than mild.  
I plan on this being the last time I have to quit, Chantix has made this a breeze so far!!"