Solid stuff for Raimi fans, and it's so good to see McAdams sink her teeth into a role like this (though I disliked O'Brien). For a survival flick--typically not my thing--it hinges on a nice character twist that avoids trial-and-error montages of learning the ropes in the wild. It mines plenty from its power dynamics and the equivalence of uncivilized nature to civilized corporate life. Ultimately got a bit wishy-washy and didn't have enough opportunities for campy fun, but the ending worked.