This is a review of the first edition (2012). I have not read the second or third editions. The book information on Amazon suggests some of the problems might have been corrected.
I found this book to have helpful diagrams, but the text... you might as well avoid the text, because if you understood the diagrams, the text will take all your understanding away and throw you in a swamp of confusion. There are several places where crucial terms are misplaced, like "cup" is used instead of "cradle", or where technical terms are used ambiguously, like "height" used to refer to some measurement you are supposed to have taken earlier, but without referring precisely to which measurement it was. The book certainly does not meet the standard of an instructional book on pattern drafting, regardless of how much Matthews-Fairbanks knows about production sewing or bra construction.
Even with the diagrams, there were a few spots where I felt a bit at sea because the drafting/pattern modification techniques were new to me, but not well-explained. I also expected a bit more detail on certain cup styles that were completely absent from this book, like the darted cup.