I took the 90 minute tour with my family and it was a good way to spend about 90 minutes. I bought the tickets from the Fullers kiosk and it also included a round trip ticket to Devenport. The cruise was very simple and stopped at Rangitoto Island for about ten minutes, which is not enough time to visit the Island but did provide for some good photos of the surroundings. The boat also passed by some of the boats of the NZ Navy along with a close up view of the Auckland bridge before swinging by the wharf area and then returning to dock. Along the way, you can enjoy a free muffin and coffee/tea.
If you have the time, take the visit to Devenport since it is a a nice area and take the walk to the lookout area for some terrific views of Rangitoto Island and Auckland.
Between the two, you can definitely spend a relaxing afternoon and enjoy.
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