We always use it. I love the convenience!!! I love not having to schlepp suitcases through a crowded airport. I love the money it saves us. I love the corny video they play after you leave MCO. I love the tangible excitement in the bus as you approach Disney property. I even love the fact that our resort isn't the first to drop off, so I get a quick peek at another resort or 2.
Just be sure to pack a bathing suit or whatever you'll need to hit the parks in a carryon, as it may be a bit of time before your suitcases arrive at your room.
(Oh, and Ms. Mouse, we'll be celebrating our 25th anniversary this year too!!! We were married on 7/1/89!)