Just back from Hawaii. We had a perfect vacation. Four days on the Hilo/Puna side and 7 days in Kona. Great weather, saw some amazing things topside and in the water. Snorkelling, diving and beaches were beautiful.
I dove Kona Diving Company at Gina's suggestion. I went for their 3-dive package (2 2-tank days and their 2 tank evening/manta night dive). They were perfect. I can't say how they compare to other operators there (and there are many choices), but my experience with Kona Diving Company was awesome. The reefs on the big island are impecciable and the vis was amazing. Lots of wildlife. Mantas, tiger sharks on 2 dives, one whitetip shark, dolphins, turtles, a whole school of eagle rays, 2 octopus, 5 kinds of eels, one nudi, plus all the reef fish. Lots more to see I'm sure. I only did 6 dives! The manta night dive was the most incredible dive I have ever made. We had 28 mantas doing loops over our heads (almost scraping the tops of my strobes). We stayed for an hour of this and I shot until my strobes ran out, then shot available light for a while then just kicked back and took it all in. Amazing!
KDC treated me very well. I'm used to and expect to haul and set up my own gear. But I can get used to having someone else do it for you :-) They took my gear at check in the day before my first dive (a little leary to be honest), and all my gear was on the boat the next morning rigged up. They changed over my gear between dives and took all my gear back to the office, washed and dried it and had it on the boat set up the next morning. Kinda luxurious but I got used to it. Nothing lost or misplaced. They have 2 large electronics rinse buckets (large size rubbermaid bins) that fit my Ikelite w/ 2x strobes. The staff was very friendly and good at spotting the small critters. ~ 3-4 divers per divemaster. Good food (lunch or dinner) onboard. No trouble handing down my gear.
They did take snorkellers with us on the manta dive, but unfortunately I couldn't coax my kids and wife to come after all. I'm very comfortable on night dives but for those who are leary of the dark--don't be. There were so many divers/snorkellers from so many boats in the water that it wasn't dark at all. More like a swimming pool at night with the lights on. I dove with only my strobe lights, then when my strobes ran out no lights at all and was quite comfortable. I've done the stingray city in Grand Cayman and Stingray/nurse shark alley in Belize but the manta dive tops them all.
I can't say if these guys are better than annother operator on the Big Island but I'd choose them again easilly.