Katherine Heigl
This movie was okay, not bad but not groundbreaking or anything.
What I did take from it was Katherine Heigl's performance. To be direct, she was brilliant. The role of the OCD/psychotic wife was just perfected by her.
I got Goosebumps when she *SPOILERS* found out...well he told her about the affair and she said they have to kill her. He said you're joking right and she said "Does it look like I'm *beep* Just an amazing performance Ms. Heigl.