Overall, I really enjoyed the movie. I, as well, could not believe that NBC would cancel the series, so seeing the movie was a relief. It was good action, lots of twists, and a great thrill ride overall. Unfortunately, if you haven't watched the series, it would be quite difficult to follow the movie although the authors do try to make a summary at the beginning.
There is also one major goof: The explosion at the beginning of the movie (and at the end of the last episode of the series) takes place in the subway, the flames and the explosion's force hits the street and throws a parking car to the air. Well, in the last episode of the series (TNT showed it just before the movie), the parked car is on the right side of the street. In the movie, it is shown on the left side of the street. (It could be just the opposite, I watched both scenes a few times to make sure so now I am confused :) ) It seems like a simple mirror-image mistake, but I thought it was quite entertaining...
There is also one major goof: The explosion at the beginning of the movie (and at the end of the last episode of the series) takes place in the subway, the flames and the explosion's force hits the street and throws a parking car to the air. Well, in the last episode of the series (TNT showed it just before the movie), the parked car is on the right side of the street. In the movie, it is shown on the left side of the street. (It could be just the opposite, I watched both scenes a few times to make sure so now I am confused :) ) It seems like a simple mirror-image mistake, but I thought it was quite entertaining...