Mac hardware doesn't break, but when you purchase the four year warranty on a Dell (which will get you a total near the price of an equivalent Macbook) it will break a few times during the four years, but each time you get it fixed or replaced next day at home.
I've yet to have any of the Apple laptops that I've owned (or desktops for that matter) that have broken in that timeframe. In fact I'm using an MBP that's going on it's fifth year here, and the only thing that's changed is I popped in a new battery after about four years. Excellent track record for me. (Of course, YMMV.)
I've never seen one break long after that. In fact, I finally just had to part ways with an iBook from 2001 that lasted me over a decade, and upgraded from 9.2 to 10.5.