As Jamie Frevele puts it on The Mary Sue:
"It’s awesome because it’s incredibly effective and well-done. The script, by [Joss] Whedon and Drew Goddard, who also directed, is just spot-on and clever, while also being scary and gory without being gratuitously violent. (It is, after all, slasher movie at heart.) One-dimensional characters are given depth and reasons for being there besides dying. Every scene has a purpose. Everything works beautifully in The Cabin in the Woods, and by the time it’s over, you can’t believe what you have just been through. It’s a movie that happens to you, because it hits you over the head with its sexy, beautiful brains."IMO, I love the playing of horror movie paradigms in the same manner of Bill Willingham's Fables or some of Neil Gaiman does with fairy tales - by combining characters from different stories together and watching the fireworks. Good stuff!