PB, the same question twice :)
11

stephenphuket
I have been diving with Lanta Diver they were a very professional set up with great gear, staff and boats.
Koh Lanta is not in the same league as the Similans ( The Similans are the best dive sites in Thailand) but for Non divers Koh Lak may not be the best choice.
I hope this helps.
Stephen.
Thailand diving.
Similan Islands Liveaboards Thailand
Pro tip