We did this dive last night and the manta rays are fantastic! They swim right up to you, mouths open, and turn upwards at the last second. Please don't touch them and one accidently bumped into my camera so be careful if you have lighting arms and leave your snorkel on the shore. The entry and exit are challenging and the long surface swims in the dark is a little intimidating. Do your research with this site, check it out during the day and the night before to see entry and exit details. I would not recommend this for anyone who has not done a significant amount of rocky shore entries. Last night we headed back in right before low tide and a slight current (pulling us out to sea) was present. It was a not big deal, but I would not want to be attempting the swim in rougher conditions. If you are a beginner or if you just want an easier dive go with one of the boat tours, they do a great job. Whether you do this by shore of by boat, this is a must do dive. I have done hundreds of dives in Hawaii and frequently see manta rays. This instantly became one of my favorite dives. On a final note, the local yellowfin goatfish have learned to feed like the mantas. They swam right up to our lights and even pushed against our lights as they fed on the shrimp.