Hello Next Please,
As an resident expat in Luanda, I can say life here is not really rosy, far from it. But violence is not as bad as you could find in some other big african cities... and obviously much less than what we get in Nigeria.
As for Heli malongo helicopters, they are based at the Malongo oil base, North of Cabinda city, and life here probably looks like a common camp life, Here too, no reported violence as we hear from Nigeria.
As you say, "hours are plentyfull !"