Watch out for fare rules on domestic legs.

Even if the web site and your eticket says one thing, the incompetent's at the airport say another (and yes, I use the word incompetent's as the supervisor agreed that they were incompetent - the choice I gave was incompetent or dishonest and he chose incompetent).

I had a C/D ticket HAN-SGN-HAN on the weekend, meeting finished early so headed out to airport to check-in and request earlier flight - no luggage as a down and back in a day trip.

At check-in, no the ticket has been half used so you need to buy a new ticket to move to an earlier flight - no supervisor available to discuss this with. Checked-in for original flight.

Go to domestic lounge (not great...) ask at desk, this time told I can pay the difference between D and C to move flights.

Go to internet stations and show them that in fact a D and C ticket can change flight time without fee, no the internet is wrong.

Call supervisor, 'sorry, the internet is wrong'. Pull up my eticket with fare conditions which show that flight change without fee is allowed, 'sorry, eticket is wrong'. This is when I asked was the airline and it's management incompetent or dishonest - to which he answered yes they were incompetent.

Service aboard is acceptable, better that US F class domestic but much worse than most Asian carriers.

Lounges are very ordinary.

I am stuck using them domestically for the next 18 months