I flew LHR-ICN-SYD ealrier this year in C. Found OZ excellent, crew, seat, food, ICN for transfers all good. Only downside the IFE was pretty rubbish and when you have flown x4 best part 11 hour sectors in a few weeks you begin to realise how good some airlines IFE offerings are..!
G-BOAC did an excellent OZ TR.
http://www.flyertalk.com/forum/showthread.php?t=756045