I just finished reading it about an hour ago. I am a VERY slow reader, and read only a chapter every week or two due to various other activities.
With the above in mind (as it is likely a major contributing factor in my impression of the book), I found it sometimes didn’t flow smoothly. I felt like he often bounced around before he finally made his points. His writing is more “technical” than inspirational, which is certainly fine, of course, but I’m a huge fan of Pope JPII’s writings, and I guess I’m trying to draw an unfair comparison (not comparing apples to apples, as it were). Nevertheless, it answered some of my questions (and raised a few new ones), and helped me understand some topics more deeply. It was also interesting to see the variety of sources he drew from, as well as how he methodically disproved several “conclusions” made be historical-critical exegesis.
I hope I’m not discouraging anyone from reading the book. I do recommend it, but with the caveat that it may not be as emotionally moving as you might hope/expect. If I had not had those expectations, I probably would have enjoyed it more. For example, I read his “Spirit of the Liturgy” several years ago without such expectations, and enjoyed its explanations of the history and architecture related to the Mass.
All I’m saying, I guess, is to read it for what is intended to be: a step-by-step guide to the biblical description of who Jesus is. Don’t expect a JPII-esque writing which will deepen your devotion to Jesus Christ and His sacrifice, although there are some parts that will do so (I did highlight several things for that reason).
Buy the book, and read it to gain a better understanding of Jesus’ teachings. I will probably read it again sometime myself (hopefully faster), and I’m sure I will enjoy it more.