Quite disappointing, was expecting much more. Too much time dedicated to presenting the characters - that are as tedious at the 50-minute mark as they are at the beginning of the movie - compared to the actual action that only gets slightly interesting in the second part of the last act. Guys, dark corridors and empty rooms are creepy, ok, but enough is enough! A note: IMDb doesn't currently allow users to rate movies using tenths so I must clarify: my displayed rating of 5 is actually a rounder 4.5