Topic: Health & Wellness / What should I opt: teeth whitening or veneers?

Hi, all Susan here. I am thinking of undergoing a treatment for teeth whitening at Dr. Agatha Cybula ( http://www.parkerhilldental.com/ ) at Mississauga . One of my friends was telling me about veneers that could be an alternative to my issue other than whitening. My teeth are yellowish and which is mainly due to smoking and coffee. So I found veneers good when I heard from my friend. So I am confused whether to go for whitening or veneers? What could be the best thing that I should be opting for? I am confused.
Can anyone here tell me the negatives and positives of both , so that I could decide what should I be opting for?
Anyone here, with any experiences with this?