This is me on the Magic Express bus from the airport to my Disney Resort.
I love that I do not have to pick up my luggage-Disney does it for me with the special tags I received from them. I do not have to worry about transportation from the airport to the resort. I love that it is included in my resort cost, no additional funds. I get to watch movies about Disney on the way to the resort.
I can use it when I leave my Disney resort and head back to the airport to leave (this is sometimes referred to as the tragic express) again I check my luggage in at the Disney Resort and they get it to the airport for me. This can make it possible for me to have some more park time on my departure day:)