I went there about 5 years ago, great wreck diving, loads of sunken Japanese warships, only did the wrecks so I can't comment on other dives but did see quite a few big fish, also saw dolphin's jumping at the surface while eating lunch which was good. I think there is a cave to dive in there as well. Coron is/was very underdeveloped, most accomodation was pretty basic and the majority was on stilts over the sea, nice quiet place though, only local Karaoke for entertainment! Almost all people staying there were divers. But as I say this was 5 years ago.