I went on the Molokini and Turtle Town tour in late August. The employees on the boat are friendly and make sure everyone is safe and comfortable. They also do a good job of explaining the weather, water and a bit of information about some of the neat things about Maui. The water is a bit brisk if you aren't use to it. I would bring a long sleeve rash guard. The snorkeling itself, was not great. They did tell us on the boat that Molokini was not known for its marine life but for its clarity. The water was clear, but there were hardly any fish, and the crater does tend to get full with other snorkel tours quite quickly, I was told to not swim to the side of the boat because they were expecting other boats to come in and want to anchor. Pretty disappointed. We then went to "Turtle Town" and the water was murky. Probably 15 feet visibility. I did see one turtle. What is interesting about this location is there are also a lot of kayak tours so as a snorkeler you have to watch out for them. My nephew went to the area of the water they told us to not go... and saw 5 or so turtles. You can access this "Turtle Town" from a local beach, which I would suggest doing . On the way back to the dock the boat crew passes around an envelope for people to tip them in. Overall a nice boat trip, but not a good water trip.