Good - I think the central thesis that the main feature of providing mental health support to perinatal women is through 'holding' and that what 'holding' means is to provide a stable therapeutic relationship that provides some directive reassurance. This is distinct from other realms of mental health where you presume the individual to have more agency. In perinatal, the woman does not have the luxury of time or energy to express that agency, and must trust you to hold that for her. It is codependent in a way that normal psychology is not, and that is appropriate.
The six components are extremely handy!
Bad - I am Scottish. If I spoke to any perinatal women using any of the language in this book I would, rightfully, be verbally or physically dissuaded from doing so again. It's far too self-aggrandising, and the structure of the book itself reflects this. It could have been an introduction, then a chapter on each component, one on each common presentation, and done. The rest is repetition.
However, if you can translate it into your own dialect, and flick through the dross to what's relevant for you, then I think the substance is actually invaluable and essential reading for anyone working perinatally.