I was impressed from the beginning because they loan prescription goggles, something I’ve never seen before. (I have my own, and they make a huge difference.). The mantas are huge and swam so close that they touched us - very impressive. Sam, Sienna, and Nick, were very knowledgeable, skilled at working with tourists, and very patient. They knew the names of each manta we saw. I will say that there were waves, and I left a little early because I felt nauseous. But that does not diminish my high recommendation for this trip.