I highly recommend the GTAA off site parking. Even if it is more expensive than Park n Fly, it is worth every extra penny! We used coupons too, so it made it much more affordable. Haven't been there since the contruction, but I'm sure it's even better now. So easy to use. Park, grab bags, walk to the tram! "Trains" come every 5 minutes (just like the trams at MCO). Quick ride into the terminals. If you go Park n Fly, you have to wait for a shuttle bus to pick you up, and I have had bad experiences waiting for them. Going back to the lot from the terminal is just as quick and easy.