Forget about what everyone said. I remember hearing horrible stories about the Calculus and Organic Chemistry sequences, but those were nothing compared to other courses. I agree with being realistic so I'm not saying you should do it.
However, from my experience, of the people who make it, you have the truly "gifted" ones, but those are the minority. Then, you have the rest who work hard, late into the night/morning, office hours, work in groups, and so forth. The ones who didn't make it weren't prepared coming straight out of high-school or weren't willing to work hard enough once in the major. But forget all that if you're really just in it for the pay. You'd be miserable. Besides, there are far easier ways to make a decent wage, many of which have already been mentioned. Regardless of what you choose, at least have some confidence in your ability to succeed.
