The Churchill sections are wonderful, but a lot of the hero-worship is almost funny, like a Monty Python sketch or something. ("No British officer could possibly look for a finer example of leadership than that of Churchill. And his eloquence, kindness, love of life, passion, wit, humor, warmth and imagination are without equal in the entire human experience!")
The Hitler sections have some good military and political analysis, but no psychological discussion at all. The author knows Hitler is a loathsome villain, and that's all there is to it. But if you already knew that there's not much point in hearing it again second hand. General Strawson quotes from Allan Bullock's Hitler writings so often it feels like a book report!