I would also recommend the towncar as a specific cost thing, but, there is a certain painlessness to using the transfers with the split land/sea trip. IF you get the transfers, you also get total managing of your luggage. What this means is you get tags to put on your luggage before you leave home. Disney will collect your luggage for you, bring it to the resort, and, upon your day of disembarkation to the Wonder, they will also bring it there for you. And the buses are not the resort buses, but touring buses and make for a pleasant no hassle mode of traveling. And, if you get this for the way back and are one of a number of airlines(we always fly American, and they do this), you can check your bags for your trip home right at the port and get your boarding pass immediately. All you'll have to do at the airport is go thru security and go to your gate. When we have no planned detours we do use the Disney transfers, but when we want to do otherwise we do usually get towncar or rental. It's all in what your idea of the trip is.