The snorkel with manta experience was clearly the highlight of our month in Hawaii! The ease of making reservations, the professionalism and knowledge of the tour guides, and the mere 5 minute boat trip to the experience were all excellent.
This is NOT for a first-time snorkeler and requires a level of fitness to jump off the boat and then hold on to the PVC railing in a prone position for 45 minutes of manta viewing. But for us, it was simply fabulous!