The Hyatt private transfer service is very slick, especially after a long flight.
You're met at the gate by what I believe is an airport employee. This was very useful for us as we were using the 72hr visa on arrival but there were no signs showing for this. She however knew what needed to be done. ^
Once through customs, they then take you down a private elevator into what looks like a hotel lobby & your waiting car is parked out front.
As there were 5 of us the fact the hotel could offer us a minivan was also very useful.
(We didn't tip)