Studying this book as a small group and the men in my group and have found this book to be excellent. We've had many great conversations arising out of the text. While I've enjoyed each of John MacArthur's books that I've read, I've found this book to be an easier read that his other offerings and so more suitable to read for enjoyment rather than as an academic/theological exercise.
This book speaks to both men and women and is appropriate for each generation. MacArthur writes in such a way that it isn't too academic and lofty, and neither is it too dumbed down. The insight to personalities using Scripture references regarding the apostles speaks to the variety of people in this world. In small groups it is great fodder for discussion to pick out who you feel you are most like in comparison or in attempting to analyze each other.
I was about to give up on teaching my bible study class, until one of my students loaned me her copy of Twelve Ordinary Men. What an eye opening, touching story that shows the disciples as what they truly were... twelve ordinary men. Read this book you will not be sorry.