The style of story telling Reminded me a lot of William Shatner's autobiography, Up Till Now. Sir Roger is more restrained, as befits his British background.
The book's main weakness is the fact storytelling is a bit too good at directing attention away from Sir Roger. As a result, we learn the surface one. , , and not too much else. He's a jolly companion who wants you to have a good time.
If you are a huge fan of Maverick, the Saint, The Persuaders, and his Bond roles, I think you'll leave the book wishing for more. But that's part of the actor's art: Leave them eager for Moore.
Have fun!