One week ago, 6 of us signed up with Neptune Charlies or Manta Ray Divers out of Kona to take a Manta Ray snorkel tour. After having dived and snorkeled all over the world, including the Manta Ray Dive in Kona, and asking numerous questions I thought they would be a quality dive operator. I was wrong. They were sloppy, uncaring, and hurried throughout the entire trip. The onboard head did not work, the crew and captain were surly, and we were herded like cattle throughout the trip. After a call today to the owner to try and rectify our bad experience, asking for half of our trip refunded, we were instead offered a free trip next time we visit the Big Island. Unfortunately, that will be 3 to 5 years for us to return and the other 4 will probably never go back to the Big Island. If the owner had offered to refund half the cost of this unfortunate trip, I would have still written this trip report, adding the owner realized the problems which occured during our trip and had refunded half our money back in an effort to make ammends. Unfortunately, that did not happen. I will not be accepting his offer of a free trip...it is not worth my valuable vacation time to waste it on a second rate trip.