I've read all the introductory sections. The main part of the second half, the guidance of the 64 specific circumstances that is the actual I Ching, I've deliberately left to explore as I'm led to the hexagrams by asking guidance for specific questions. So I'm kinda finished, as I've done as much of it as I intend to read in order as a book. The rest is for a lifetime of consultation and study...
It's hard to know how to assign star ratings to this book. What am I scoring? The ancient wisdom of the Taoist masters? No-one could be that presumptious, surely? I don't know the original language, and haven't read other translations or commentaries, so can't really judge Ni Hua-Ching's contribution. I'm not sure how much of the hexagram commentary is his, how much is from Confucius etc. I suppose a true scholar could compare this to other I Ching translations and commentaries, and rate based on that. But that's not me!
Some of the introductory sections are inspiring, some are strange and confusing, but that's Taoism for you! I'm not convinced by all of it, but I don't need to be. The divination and guidance from the hexagrams are the important bit, and that will be true so long as you approach it with a pure heart and a clear mind.
The introduction is very interesting from a Taoist philosophy point of view, it puts it all in context. There are instructions on how to actually consult the I Ching, but not very extensive considering how big the book is. But if you want to know more about that you can look on the internet, and his main point is to keep it as simple as possible, so he didn't need to say any more about different methods. More instructions would only confuse things!
What it comes down to is that I like this guy, I trust his translation and interpretation (on instinct and recommendation from Mantak Chia of this version), and don't feel the need to read more elsewhere. So I guess that's 5*.
This book gives me what I need to incorporate the I Ching into my life. So it's now a case of using it. Reading more different books about it and taking the scholar's approach probably wouldn't add anything, because this is something you need to experience and relate to your own life, not read about!