It's fine. Not spectacular. Reverse herringbone seats like many other carriers. Worst thing out of Melbourne is the timings. MEL-SGN-CDG means getting up early at the start and then having over 6 hours in transit in SGN. The lounge is quite decent, but there's absolutely nothing else to do there. (And you'd have to get a visa to leave the airport.) There might be destinations with better connections, but I never went anywhere that VN flies directly and you can connect to pretty anywhere on AF from CDG. While CDG can be a mess, VN lands at terminal 2E and most AF short haul flights depart from 2E as well, so it's an easy connection.I have been told by people at work that Vietnam J is actually quite good.
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As Kremmen said it's fine. Cabin crews English was variable on our flights but they were friendly and tried to please. I found the B787 seat hard on the long flights to/from Frankfurt so I used the blanket as an extra bit of cushioning.I have been told by people at work that Vietnam J is actually quite good.