Scheduled time 75% of the time, so I’ve moved to parking at the Parking Spot.
I’ve been pretty underwhelmed the last few times I’ve used them, though. I’ve sat at my car for over 20 minutes waiting for a driver the last 3 times I’ve parked there, including one where there was a shuttle picking people up and they completely ignored me. I went and talked to the person in charge there and despite having two drivers just chilling over in the side lot, I had to wait for another 10 minutes for another driver to drop people off and then grab me to take me to the airport. They just don’t care.