Hi, and Welcome to Cruise Chat. We like to use the cruise line's transportation from Orlando to the ship. It may be, in fact probably is, a little more expensive than the other transportation options available. However, we likt the fact that you give the driver your luggage, and the next time you handle your bags is when they deliver them to your stateroom. Being the basically lazy slug that I am, I like easy, even if easy costs a little bit more.
Check some of the earlier posts, and you will find several posts by Dave and Sonny and others who will also have the links to other transportation options from the airport to the port.
Enjoy your cruise-you're gonna Love Cruising!