Like Matt, I too was told Lahaina divers was a great operation, and I would have to agree. They were great on my recent trip. Unfortunately, on my particular dives I believe I took the wrong trip. Their website shows which sites they hit on each particular day of the week. I got some advice from a different dive shop which told me that there was better viz at the Molokini crater than the island of Lanai because of prevailing swell. So I chose the day to dive at Molokini instead of Lanai. They were right about the viz. 100’ easily everywhere in the crater. But I was dissapointed with the amount of sea life. It was just okay. We dove a spot called the "aquarium" and it was anything but. Back on the boat I made a comment to this fact, and my divebuddy (I met on boat) said he had dove yesterday on the Lanai trip to the Cathedral caverns and there was 10X the amount of sea life. He even showed me pictures on his camera. I definitely missed out. The Cathedrals are a can’t miss. I would say if you have only one trip... choose Lanai. I believe the second dive on the Lanai trip is to Turtle Town, and in my buddies photos it really lived up to its name. If you can do two trips you can’t lose. Have fun.