I liked this film. But sadly it came over very cheaply made. A shame really as I think if they had a bit more money to spend on it,it could have been so much better. The cast are however, great, as is the story. But it is let down by a clear lack of funds. Certain scenes could have had much more impact if fleshed out a bit more, like when one of the guys finds a hidden burial pit hidden, we are just told "bodies,lots of dead bodies", this sort of film we should at least be able to see them,a handy yardstick for us to know just how long this islands lethal lure has been going on. As for the "Siren" maybe when it becomes deadly, maybe a slight transformation would have been quite good, it is supposed to be a supernatural being after all.
I will just finish off by saying also don't judge the film by the cover of the dvd, it is misleading.