Not that I am a literary critic, but I thought his style was folksy and down to earth, his recollections were delivered in such a way as if you were sitting down and chatting with an old friend.
I wasn't expecting a Buffalo Bills only book, nor should he have written a Bills only book, it was his life story, focusing on his career in coaching.
He admits up front that he took literary license in writing the story. Perhaps there were some innacuracies (he identified Quinn Early as having been from San Diego) but I found it to be a good read.
Surprising was the venom that he had for his GM in Kansas City, It seemed to be his lowest point in coaching as he wanted to stay and continue to build the team.