I have been using the Mac Pro Laptop for two years. Every few months the adapter lead gets separated from the input socket on its own. Once it was replaced by apple, thereafter even though I had purchased a extended warranty for three years, I have been told to buy a new adapter for Rs8000/-.
This is a manufacturing defect and Apple customer care and technical staff are trying to pass it off as a physical damage. I seriously recommend all those who buy an apple product to take a written guarantee about this problem otherwise periodically they will have to shell out Rs8000/- for a new adapter ( even though there is no fault of the user)/