Its very useful when picking up passengers as well. As a passenger i have found it very useful as you can check the inbound aircraft eta. A few years ago i used it to see the status of my flight from Manila to Abu Dhabi and it had departed on time so headed to the airport. In the meantime a large thunderstorm had built up and i could watch the inbound flight enter a holding pattern and eventually divert to Clark which meant a lengthy delay (30 hours or so)