Choosing the best Similan Islands liveaboard boat of diving safari cruise is not getting any easier. Nowadays, there are more boats on offer and just about all of them are excellent value, visiting the best diving sites in Thailand. Some are based on the most competitive prices, while others want to offer luxury to Thailand's best diving. In addition, the various boats on offer all have something different from the others. We have a unique system to help readers filter the boats which they may be interested in, but here we also explain the many other factors.