I found it to be well written and surprisingly thoughtful.
I don't take this stuff seriously -- it's just for fun. But this book was surprisingly accurate! I added up the numbers according to the book, using my previous name. My life was quite a bit different then -- it was downright eerie how the book accurately described my circumstances at the time.
A friend gave this book to me, and I had a lot of fun adding up the numbers for my friends and family. I think "By the Numbers" would be great to take to parties. What a great conversation starter!
You could take this book to the office -- not only for entertainment, but you might get to know your coworkers a little better too.