Good luck with trying on-line check-in etc- recently did SY -BKK - LHR - HKK - Sy and tried to check-in online for every sector and got the message that this service was not available- absolutely useless.
As for booking with Qantas, you'll be sorry. Their cabin staff were the worst I have ever seen - uncaring, not helpful, and clearly just wanting their self-loading freight to be just that - had to ask for everything including a drink, and the request was met with a "your a pain in the ar?e" attitude. All this in their so-called premuim economy.