I've had limited, but excellent, experience with Vietnam Airlines on shorthaul international (BKK-SGN) and domestic flights. Both times, in business class.
With respect to IROPS, a lot of smaller airlines (and not so small) based in 3rd world countries tend to come up short.
As an aside, when I first starting reading the OP's post, I guessed (correctly, it turns out) that this was from a sub-five FT poster.