Well readable and researched. Buckingham details the training undertaken for the invasion, covers detail, before moving onto the often neglected following days and the intense combat that followed as the Germans attempted to destroy the bridgehead and the Allies sought to expand it.
Buckingham asks a lot of tough questions, and leaves some pretty scathing analysis for some of the units involved. While not all arguments may be completely valid (based off opinions read elsewhere), the author leaves one with a lot of food for thought. In addition, he argues against the credibility and accuracy of Stephen Ambrose and his extremely popular books.