We have gone the last three Decembers, once at a Disney resort and twice renting a condo. In terms of transportation, I much prefer going with a rental car verus the Magical Express. To me, the convenience of not having to wait for the buses was worth the cost for the car and parking. It can be a pretty long wait for the bus at the airport, you may have to go to a few hotels before you get to yours, it can be a pretty long wait for the bus to and from the parks, and occasionallly you may have to take a couple of buses to get somewhere (e.g. to get from Pop Century to the Boardwalk, you have to take a bus to Epcot, and then another bus to the Boardwalk). If you are patient and know going into it that is what you'll be doing it's okay, but again I would rather spend the money instead of spending that much time in line and in transit going places. However, I have a friend who just spent a week there and loved how he never had to drive anywhere. It all comes down to how you prefer to spend your money and time.