Surprisingly, a decent remake of a genre classic. Two things I would have changed: (1) the overbearing musical score for the entire setup portion of the film, and (2) the choice of Riki Lindhome as Sadie. The musical score took away from the possibility of setting a mood in the beginning; it seemed not a second could go by without a blasting crescendo. And Lindhome's acting was far too rigid, causing her to come off like a middle school bully. But, whatever. I suppose they were going for an abrupt transition from the flowery setup into the grim conflict.
I loved the choices for the father and mother: Monica Potter and Tony Goldwyn nailed their parts. Goldwyn's Life-Saver/Tough-Guy character is what I wanted so badly in the father from Funny Games. But Funny Games is a completely different arrangement, as well as a better movie altogether. I was also thrilled with the gore and the suspense the movie was able to pull off. Despite the gore being comparatively mild, the movie still managed to depict some cringe-invoking violence.
I gave it 3/5 stars on Netflix. It's neither garbage nor great. American cinema has long way to go in the "serious horror" category.
(As a side note, it took a conscious effort to take Martha MacIsaac's character seriously after seeing Superbad. All I could picture was her as Becca, which caused me to laugh. Then, I started thinking about McLovin and really started laughing.)