This movie is so awesome. Just thought I'd share my opinion.
I thought Radha Mitchell did a great job, especially when [SPOILER] she was getting attacked by the creepy children-type monsters when it becomes dark the first time. And after they disappear as ash, she passes out, and then wakes up screaming in the day. She did a great job protraying her character as dazed and confused and scared. [/SPOILER]