Having read, and found extremely useful, three of Fr. Westerhoff's smaller books ("A People Called Episcopalians", "Holy Baptism" and "To Love and Cherish"), I was excited to finally read this full-length work. Overall, however, I came away largely disappointed. Ultimately, it seems that the author could not decide what type of work "Living Faithfully" was supposed to be. Was it an introduction to the Book of Common Prayer and its various sections? Was it a discourse on its use? Was it a collection of personal reflections on the author's own "prayer book piety"? The work had all of these perspectives, and then some, but often assembled, it seems, in a haphazard fashion.
At the same, Westerhoff often made conclusive claims that could have used a citation or other support. For instance, pg. 35: "It is not appropriate to celebrate the Way of Stations of the Cross on Good Friday, the typical Protestant Good Friday liturgy." Really? Why is this not appropriate? He gives no support for this, but simply goes on to talk about the BCP liturgy. Here's another example, from pg. 25: "Stories are the bottom line of human communal life: Ultimately, nothing else is needed." Certainly, this fits with the author's overall (and questionable) assumptions in that section, but that sort of claim appears to me to need more than just his opinion.
But that's part of the problem: If I knew what kind of book to expect, I would know how to read and filter the text. But because the work switches between exposition, speculation and outright opinion, the reader must constantly shift their reading lens.
All that said, this book has some good qualities. The author does have great experience, and certainly some valuable insight at times. But I would not recommend it to a new Episcopalian as a way of explaining the BCP unless they had previous experience in ritual studies. For a seasoned reader of such material, however, it's OK. Read it to help supplement your knowledge of the BCP, and keep it on the shelf for reference.