A lot of people have rated this book very highly. It may indeed result in a successful fit. However, this assumes you can work your way through the densely packed cramped text with small complex line drawings, with instructions criss crossing through out the book.
I'm new to pattern drafting and my dressmaking tutor told my class to buy this book. I had hoped, as we were all novices to pattern drafting, this would hold us by the hand. For someone experienced in pattern drafting I am sure they will be much more confident in reading through the instructions. I was left increasingly frustrated, after having to flick backwards and forwards to find out what "standard" measurements to use (hang on, isn't drafting your own pattern supposed to be based purely on your measurements?) and then having to figure out where I was for the next step.
I'm very much a visual learner, and would not recommend this book for people who don't do well with long sections of concise technical text. I've been dressmaking for three years, so am certainly used to pattern pieces in general, so I wouldn't blame general lack of dressmaking to be the cause of my difficulties with this book.
I've looked at how pattern drafting explained by other sources and felt many were more beginner friendly. By all means, this book covers a lot, but I would steer clear of it as a beginner unless you have someone to help you go through it in detail. Unfortunately my tutor hasn't really helped translate it very well for me! my friend (who also bought the book) has despaired after drafting two bodice blocks and cutting out a muslin, to discover it didn't fit her bust. Only at this point, half way through the book did she find out (not mentioned earlier) that if you have a fuller bust you need to make additional modifications when drafting the pattern. This kind of lack of clarity is very off putting, and could have been much better explained/laid out.