Pros: The flight was relatively comfortable, given that it was a narrowbody on a 5-hour flight. GA's other CGK-HKG flight is on a 330, so much more comfortable, but they had nice blankets and pillows, good food, and free beer.
The staff were all superb, so I'll fly GA if I can in the future.
Cons: I don't like Boeing 737s. There are too many "window seats" that do not actually have a window. I try to avoid them, but GA's flight was on a 737. I actually was originally placed in such a windowless window seat, but thankfully the flight was not full, so I switched seats.