I listened to this on CD and thoroughly enjoyed it. I of course knew who Churchill was, but did not know more than the basics about him, so I learned a lot from this biography.
Others have commented that this was too short and that you should read the longer biographies written about him. For me, however, this was the perfect length. There is so much to learn about in this world, I don't have the time to spend weeks on one particular prson. I want to learn about Churchill - I don't want to write my master thesis on him.
So for my purposes, this was a wonderfully written, concise, and well-researched book. If you want to acquaint yourself with one of history's finest men, this is your book.