Geographic goofs aside, this film is fairly good. It is essentially an educational piece platformed on a drama with multi-dimensional characters moving the action along as they provide enlightening information about such a likelihood. It addresses some of the public notions of what would happen and why and makes the distinction between what we've seen in Hollywood portrayals and what scientists know to be likely, especially with regard to prediction and intervention. The science is pretty accurate and the mood is one of the inevitable. It's not a matter of IF but WHEN a NEO strikes Earth.
The production is British but they put the object strike at Pittsburgh, my hometown. I was a bit amused. Why Pittsburgh?