The Darkest Hour is a very well written survival horror adventure. The Npc's are really well done and differ in a positive way from the average undead you get in many other d20 horror adventures. I especially like the undead worm. The pacing of the story is fast and offers many possibilities for the players to explore different solutions. Playing time should be about 4 - 5 hours, but could be easily expanded. I am very satisfied with this product.