Someone told me this movie was bad a long time ago, and explained everything that happened in it to me, and it sounded horrible. Turns out it's really good. I can understand why people might say it's bad, because it requires knowledge of certain pre-existing media to really fully appreciate, in particular And Then There Were None. It doesn't hold a candle to Christie, but it's a clever variant and definitely worth seeing. I was really into it the entire time, and it has a great sense of humor, never takes itself too seriously.