It was very well done. It focused mostly on what was going on in the plane(speculation based on phone calls), and the air traffic controller scenes were very well done which I assume were all based on hard facts. It brings the memories of that day back to life, it was a little erie watching it. I still get chills up my spine when I see the clip of the plane hitting the second tower.

I thought it was a very good movie, and I have heard nothing but good reviews about it.