I can see that there are plenty of reviews telling why this book is essential to any typographer or typographic designer, so I won't bother repeating. however, I also noticed one particular person who gave rather misleading criticism, so I will offer a rebuttal of his points.
Lamberti-Mershon from Evanston, Illinois USA, pointed out that Bringhurst's book "bugged" him for the following reasons:
1) i hate books that are organized like, 3.2.1, 3.4.6, for points. It totally breaks up a narrative flow, and it looks ugly.
the section numbering system, in this case, makes the book an amazingly simple thing to navigate. this is one of the finest points of Mr. Bringhurst's structure.
2) the type is small, my wife saw that right away.
certainly this is a subjective matter, but I can think of no more readable book. if I remember correctly, the text (Minion) is set 10/12. are there any typographers out there who wish to question the functionality of those numbers?
3) he uses a wide border from text to page, so that I have to yank and pull and stretch the book wide open in order to see the text towards the binding. [...] My point is, the book is hard to read! Go figure.
like I said before, this is subjective, but this really is quite a readable book. the borders this reviewer speaks of are of the Renaissance sort, large outer borders for the placement of the thumbs. I don't remember a time when I felt the need to "strech" the book, the spine of my copy is in beautiful conidtion. carrying his thought one further, the overall proportions of text area to page are historically well established. to me, the structure of such a system is unquestionably comfortable.