Should I get Apple Care?

My 2011 MacBook Air is nearly a year old and has absolutely no problems, asides from the slowly degrading battery.

So I read in Apple's website that Apple Care only fixes manufacturing defects. But as of now my Mac is working perfectly fine. So I am hesitating about getting Apple Care.

Does anyone out there have a perfectly good machine only to have it fail due to a manufacturing fault after 2 years or so?