I am thinking about buying a Macbook pr 13". But I am concerned about they keys. Specifically the arrow keys. Those are the keys I use the most. I tried them at the store and they seem a little bit on the small side. But my biggest concern is how they will hold up with wear and tear. Will they loose their firmness and become worn out with in a year? And what about tilting? I heard some stories about the keys that become 'tilted'. To me this sounds like a key that is tilted looses it's firmness and gives less feedback. Will I have this problem?