I just won a new Surface Pro 2 256 GB with the newer 4300U intel chip off of eBay for $1150! I am planning on returning my Surface Pro 1 128 GB back to Best Buy as I'm still within my return period of 15 days. But, I'm keeping the power cover. Some questions: 1. For people who have the Surface Pro 2 AND the power cover, how long does the battery last with the power cover attached to it? Assuming both the Surface Pro 2 and the power cover are at a full charge each. 2. I'm thinking of purchasing the Microsoft Complete (Microsoft Surface warranty | Surface extended warranty | Microsoft Complete), is it worth it in y'all's opinion? And, what is the deductible?