As described below, parts of this book are excellent, others are mediocre at best.
First the good--this book includes numerous excellent first-hand accounts of small-unit (company/battalion) action on the Eastern Front: desperate defenses, successful counter-attacks, night raids, dismal retreats, it's all here, and these parts of the book are excellent (five star rating). I should note that the book is not very objective, and references to the "heroic" etc. German soldiers are quite common, but should probably be expected in a book of this sort.
I found the other parts of the book--principally incredibly densely written operational-scale histories of the various campaigns and some excerpts from official reports, orders, etc.--to be very tedious. There aren't enough maps, and it is quite a chore to wade through this material. I'd rate this part of the book at two stars.
Note that parts of this book deal with the parts of the GD which served as the Hitler escort unit, and there is a very detailed account of the attempt on Hitler's life in 1944. I wasn't really interested in these parts of the book so skipped them after reading a few pages, but I wanted to point out their presence.
Overall, I can't really recommend reading this book cover-to-cover, but the excellent tactical accounts make the book worth picking up.