A few Q&As I've had and answered myself.
What's the maximum wait time when they're picking you up from the airport? I know Taiwan airport is notoriously bad for making you wait at immigration. Last time it took me 1 hour 45 minutes to get through the queues, and by that time I had urgent need to go to the bathroom. From what I see, it's 90 minutes for international flights, but a mere 15 minutes for domestic flights.
Is the wait time dependent on the time you schedule the pickup or a nominated flight (and potential delays)? Scheduled time might be useful if you have an idea how long it'll take you to clear the airport, but conversely, nominating a flight might be useful if the wait time doesn't include delays. I don't know the answer to this one...
Any gotchas? There's a 25% surcharge between midnight and 5am, and on major public holidays at year end. Also, there's no refund if cancelling less than 24 hours in advance. So, I wonder if there's any point cancelling at all if less than 24 hours.
What's the extent of the service? About 20KM in Australia - Not sure if it's available in other countries like it is for cardholders in Indonesia, Philippines, and South Korea though.