This is a very convenient on-site parking option and we use it every time that we travel as a family. The sky train that takes you directly to Terminal 4 is quite convenient and efficient and if you get there at least 90 minutes before your flight you can check your bags right there at the parking lot. The skycaps that work there are very friendly but they are strict on the 90 minute rule so don't cut it too close or you'll be dragging your bags on the train.