I love the principle of this book and the idea behind it and many of the ideas running through it. I love that it's meditative and it takes the application of the gospel - our dependence on Christ for everything - into the nitty gritty of every day life in an area that so needs the voice of the gospel ringing out.
However, there are points in this book that offer TERRIBLE advice. Judging from the rest of the book, I'm sure the authors did not mean to give such bad advice - but it is there none the less. Putting a picture on the fridge of your ideal weight from a magazine or even an old picture of yourself as a motivator might be okay for some people but for many it is a sure fire path to depression and self-loathing.
Apart from a few small blunders I think for the discerning reading this book could be a helpful starting point to change the way you think about dieting and exercising.