We absolutely loved this experience! Communication prior to the event was great, parking was easy, everything went smoothly during check-in and the ride out to the submarines was quick and gorgeous. As some others have pointed out, the actual submarine part for each person is only about 15 minutes, give or take a few minutes, but it was such an amazing thing to experience - I think I spent most of it laughing at how crazy it seemed. Fish surround you, sea turtles are swimming by (if you're lucky), and even when you're not in the scooter, you can snorkel and hang out with great people and a really awesome crew who made the whole time really fun. Keep your expectations in check and you will love it! Thanks to Island WaterSports Hawaii for a wonderful way to spend a few hours in Hawaii!