I had my display replaced a few weeks ago due to a ghosting issue on the 1st gen 15" Retina MBP. The Genius told me that they can't replace something twice for the same issue. They replaced it free of charge since I am still under Apple's warranty. So I am wondering, is AppleCare still worth it at this point? Seeing as how the most expensive component has already been replaced? Just wondering before I drop another $250 for the extended coverage. Any thoughts?