whyquit.com is of the opinion that there is not way but the true way, which is cold turkey. They are veryveryvery opposed to any method other than CT. That includes nicotine replacent therapy (NRT) like patches, lozenges, gum, etc and any drug which can help you quit. That includes Zyban and Chantix.
I am not against whyquit.com, it's just that I don't consider them an unbiased site when it comes to quitting.
If you're concerned about Chantix, talk to your doctor. I know of many, many people who have successfully quit using Chantix. I am currently taking it and have had no side effects other than tiredness and some soreness in my hand and wrist joints. Neither of these are enough to make me stop taking the drug.
The other unpleasant side effect I've seen reported (mainly here and on other web sites) is nausea. You need to make sure you eat before you take the drug. I've also heard that if you eat 15 minutes or so before taking it, the nausea is less likely to occur.
Good luck!
Rob