I've spent probably 1hr15 over 4 calls in the past week trying to book US flights and have had amazing service on the whole 4.
I seem to have struck the worlds worst nightmare booking flights to CES in Jan. Yes 160,000 people go to Vegas but it's a nightmare when the NZ multistep tool shows availability of flights that simply can't be validated regardless of fare class. Something is seriously screwed with Virgin America - they've even got flights showing in Google Flights for 1/3 of the price they actually are when you click through to their site.
And while I'm rambling if people thing NZ domestic fares can be expensive currently US$600 is the cheapest economy fare on United one of those days to SFO and LAX was only fractionally cheaper!