I used their first edition for my first bike trip in 1991, and can't recommend it enough. I really didn't have any other bike book then, and this one got me across Italy, through part of France, and across Germany. I used the same edition a couple years later, and it was still helpful.
The advice was all clear, particular the directions--what to look for, where to turn. Maps were good. I've had time over the years to compare it to a couple other bike touring books, and this was clearly the best. Roads change, of course, and I hope to see new editions.