I used to scoff at this, but I have had stuff I've had Applecare'd come back looking distinctly worse for wear. However in most cases the Genius will write down the condition of the unit, and in my all-too-frequent visits to the Store they do take a very close look for blemishes before accepting the repair. AASP's are a different matter altogether, especially if they pick up. I've had ACD's with warped stands and some sort of residue smeared on the screen claiming to be a 'new replacement'.