If you are looking for reviews (which do not exist, as I write), check out the second edition, which has a number of reviews. Long story short: This is a much admired, "standard" among Alpine guidebooks although there seems to be a consensus among folks who actually have done the trek that it is prudent to supplement this book with detailed topo maps and/or other resources.
(The Kindle sample chapter is nice, especially on a PC or Kindle Fire where you can enjoy the full-color photos. My hard copy is on the way.)
(The Wall Street Journal published a nice account of the trek on 5/5/12 mentioning this book. Search "WSJ Mont Blanc." The hikers were a youngish couple but not especially athletically fit.)