I am a nursing student looking to purchase her first Mac (my school uses macs instead windows pc). I've been considering the air because of its lower cost, compared to the retina pros, and its small form factor. However, I have read of the macbook air's screen spontaneously cracking. Since I will be carrying this laptop around in my backpack, should I perhaps consider purchasing a different mac that is more solidly built? Or will the macbook air be fine, as maybe the screen cracking issue is not as much of a problem as I've been lead to believe? Any comments/advice is appreciated. Sorry if this question has been asked before.