Hi Paula
Its basically a voucher that Virgin give out to their customers who book package holidays to Orlando. On the day of departure Virgin open a check in desk at the back of Cirque in Downtown Disney, this opens at 8.30am, you can check in all your luggage for your homeward bound flight and then go off and enjoy the day, you dont have to get to the airport until around an hour before your flight then. It gives you the whole day to enjoy yourself and not worry about rushing to the airport to check in and the queues.
If you book just flights with Virgin you have to pay $5 each but i still think thats a great price for a fanatastic services.
HTH
Lisa