We flew return Sydney to Ho Chi Minh City direct. We got a good special of roughly A$500.00 each, including entertainment and shared luggage. Both flights were on time and considering the price we paid, I don't wish to complain too much about anything! The flight was just under 9 hours.
We took our own drink bottles and filled them up airside. I packed a light meal for dinner. The seats were satisfactory. Entertainment was average but filled in an hour or two so put a movie on to your own device if you are worried. The Staff were excellent.
NB: At Ho Chi Minh Airport, after clearing Customs, we went directly to the Cab rank and found a Vinasun Taxi, ignoring all the taps on the shoulder by keen Cabbies. It cost less than A$10.00 for a 40min journey to District 1. We paid in Vietnamese Dong.