This book appears to be a decent conceptual model for explaining the manifestations and interactions of the masculine and the feminine forms.
It helps not to get bogged down on the literal aspects and just accept that it's a useful model for approximating whatever phenomenon is actually at play. Some parts definitely come across very figurative and abstract, I just accepted these could not be taken as literal and trusted in the workable usability of the model.
Parts of the book come across New Agey, but I think a lot of the problems come from the fact that language is largely built around objects in the physical world, and easy to obtain objects of the metaphysical. Get too far from that and words start to lose their effectiveness. I found I struggled with the fact that the author couldn't directly define some of the points he was trying to convey, but I realized some things could only be generally gestured at, and described in more negative terms, such as what a thing isn't. There just isn't enough sophisticated language to describe some of the ideas here. Imo.
I can imagine a work that does a better job integrating the abstract or distilled ideas such as these, with more real world examples and role models. This work doesn't do that and leaves the reader with ideas too abstract to implement effectively. Especially around ideas of gift giving, purpose and karma. It feels akin to teaching a student of mathematics how to work problems on a worksheet, but failing to show how to integrate that to real life situations. There's a place for developing the key knowledge in the abstract, but if the next step of integrating into the real world is absent, it's largely useless. A complete work would receive a 5, but this is still useful enough to receive a 4 from me.