I had an interesting experience trying to get first class Quantas reward seats LAX-AKL with OnePass miles. Just simply couldn't get them. Was eventually told by OnePass that Quantas doesn't give out many reward seats to New Zealand destinations - and that they in fact give out NO first class. Asked if we wanted business class, we said no.
Changed our destination to Melbourne - got 2 FIRST class. Funny thing: The flight stopped in Auckland and continued on! I called back when I found this out to try to take a stopover in AKL, was told "no dice" that would make an official stop in AKL, which Quantas didn't allow on reward seats!!!