First the negative points. This books isn't for the seriously technically-minded (although you do pick up a lot of technical info along the way). And a lot of it - the portraits of the astronaut's lives, the in-house NASA politics and so on - will already be familiar if you've read/seen The Right Stuff or Apollo 13.
Where the book triumphs, magnificently, is in giving a sense of what it was actually like to be on the moon. You come away feeling as if you'd been there with the astronauts. The author's key technique is to tell you what they were thinking, and how they felt, as they were exploring the surface. This lets you imagine how you'd have felt in the same place.
The book did, however, remind me of one reason why the later Apollo missions failed to hold the public's interest (or mine, at least) - the relentless focus on geology. Unfortunately the book's fidelity to its subject means that its later chapters are affected in much the same way. After the 50th (or was it 100th?) description of a rock being picked up, I was thinking "wasn't there *anything* else they could have done up there?", and never wanting to hear the word "basalt" again.
Nevertheless, this is an excellent book, and well worth reading, whether you're a "rookie" or veteran of space exploration literature.