Jack's, Honu and Charlie's have the nicest boats. By this, I mean, bigger, more stable and more comfortable. You also see them farther up and down the coast. The farther from Kona you get, the better the areas are. Make sure you get in at least one of the manta night dives, awesome. The black water dives seem to be more of a gimmick to get tourists to keep signing up after they're all mantaed out. Too hit or miss for the price. The video and photo they show you might have taken a year to get. This isn't what you see on every dive.