We bought the pass because we knew we wanted to see the Maui Plantation, the Maui Ocen Center, and do the submarine tour and it was cheaper with this pass than buying all three separately. The submarine tour was the highlight-absolutely incredible! We weren't claustrophobic at all and the ship was really nice and clean and modern. The captain and the guide were both so funny and made the trip so enjoyable. The plantation tour can be done on your own if you walk the short loop and read the signs. I wouldn't recommend the tour, though, unless you happen to be right there. It is a very short loop, and a lot of the plants they have aren't even native to Hawaii. We really enjoyed the Ocean Center. It took us about two hours to tour it, they have a lovely gift shop, and the animals and exhibits are really nicely done.
Very unique to travel 130 feet under water in a submarine. Well handled from boarding the surface boat to travel to the sub, to boarding the sub, and explanations given while viewing a coral reef and sunken ship, and then surfacing. Will never forget the captain announcing DIVE....DIVE...DIVE.