Unfortunately, I have only been able to see the preview, but I was impressed by the realism and accuracy of the medical response team. As a physician, the portrayal of unrealistic medical situations too often spoils a movie for me. Because the writer has a medical background, he has successfully reproduced an accurate portrayal of an emergent medical situation which allows the viewer to enjoy the emotions and underlying themes in the movie.
I can already see myself easily hating the man with the money, and cheering for the revenge of the young girl. Revenge movies are always the best for me. Especially when its relatively easy to hate the bad guys. It appears that there's an accessory (the woman), and I hope she gets beat up too. If she was a good person, she should have stopped the girl from getting killed. I believe the director has set the stage for a powerful message that questions our own morality.
I look forward to watching the entire film and hearing the the directors commentary. I'll keep you posted after I am able watch the entire film.