If so, then why are the three main battles it portrays First Manassas, Fredericksburg, and Chancellorsville? (Antietam got cut.)
A friend of mine, who's a bigger Civil War fan than I (and I am a Civil War fan) went to see G&G. Thought it was awful and that the battle scenes, fairly authentically staged, didn't make up for it. He recommended waiting for the DVD and then watching ONLY the battle scenes.
His main criticism was that it was trying to cover way too much. Gettysburg was "focused" on the events of three pivotal days. G&G covers three momentous years. It just can't be done.