I've notice the bottom arrow on my arrow keys, located on the bottom right corner of the keyboard doesn't have as springy of a bounce as it once did. About 3 days ago I got the impression it kinda felt a bit sticky. Having a baby brother I'm fearing the worst. The performance of my MBP hasn't changed at all, however having only 4 months left allowed to purchase and extend AppleCare I wouldn't want to buy it for no reason. That and I always like to rest assured my Mac is in pristine condition.