While the ferry is functional, and if you’re moving a car between islands it’s your only option, Cook Straight stands up for itself as one of the most beautiful sights in New Zealand.
There are two ferry companies available for moving a vehicle, the Interislander and Bluebridge. We took one down and the other back, and while the Interislander had a larger ship, the two experiences were very similar.
If you have three hours, take the Ferry. You will not be disappointed.