Entertainment: Strictly BYO on both flights. I managed to lose my iPod somewhere on the Jetstar plane, so unfortunately that cheap ticket price was somewhat negated.
The service: Mac on the Jetstar service was a bit of a character, stopping to compliment a man on his snazzy shirt, while the two Air New Zealand cabin crew were friendly and efficient.
Food and drink: Nothing on Jetstar unless you'd prepaid, and a cookie, hot drink and water, plus mandatory lollies, on Air New Zealand.
The toilets: One on each plane. Both were in fine condition.
Luggage: I just took carry-on luggage, though my little wheelie case was actually put in the hold on the Jetstar flight. There's not a lot of room in the cabin of those Dash-8s.
The airport experience: I'd never been to Jetstar's regional gates at Auckland Domestic Airport before and there was a bit of a kerfuffle with a late gate change where we were directed out of the terminal to what felt like a sort of Portacom structure, I guess set up for the new services. We had to board a bus (like at a major international airport!) to be ferried out to the Dash-8. Hawkes Bay Airport is basic but adequate.
Would I fly this again? At those prices? Definitely. Why would you drive?