It's baffling to see anyone giving this movie a one-star rating; I’m not sure if they even saw the same film that I did. This is a truly awful movie centered on a group of unlikeable characters going to an island for a birthday, and inexplicably attempting to continue the story of what was otherwise a pretty good Vietnamese horror film. The dreadful characters and nonsensical plot somehow seem almost impressive when you consider how laughably bad the green screen effects are—they’re among the worst I've seen since someone handed a teenager with a YouTube channel a green screen for Christmas. If you enjoy punishing yourself, then go ahead and watch it. If not, suggest it to someone else who deserves to have a bad time.

Source on TMDB