Additionally, as previous reviewers have stated, the movie would have been more enjoyable without the constant flashbacks. For me, the flashbacks distorted the plot to a point, and sought to make comprehension difficult for those who had not read the book. I was also quite disappointed that there was a lack of significant emphasis on the way Hoover handled the Civil Rights Movement, and in particular, his frosty relationship with the legendary Martin Luther King Jnr. I believe more could have been told of that story.
On the whole, I think the content was solid: B+/A-