One thing to note about NZ is (unlike some other airlines) they do not require you to remove an infant from a bassinet during turbulence. This is a big bonus in terms of parent comfort because turbulence (by the law of sod) will occur as you are both fast asleep.

The NZ bassinet has much more secure fastenings than I've seen elsewhere - I believe it would take a significant amount of force for the child to escape during turbulence (at which time you would have quite possibly let go if you were holding them).

(This is from 2 years ago, so may have changed)