Just finished listening to the audio book. Thought it was very entertaining from start to finish. Can't say I was overly interested in the fencing parts but I enjoyed listening to Bruce speak about flying (it's really encouraged me to think about learning to fly again) and his musical career.
As for the style of writing, I thought it was written in the same manner as he speaks. And since I listened to the audio book, as I said, it didn't strike me as remotely odd.
He was critical of some aspects of Iron Maiden, for those wishing to read a little dirt - the cover of Dance of Death and the general quality of the same album spring immediately to mind - but he was never going to shit in his own bed, was he?