Definitely has the feel of a textbook, not that this is a bad thing. A lot of it will feel familiar if you’ve read books on Qabalah before but the second part in particular has a lot of useful insights.
An incredible treatise of the Hermetic Qabalah. It is quite dry, but if you stay the course and read carefully, you'll learn things in this book that you'll find absolutely nowhere else. If you know nothing at all about the Tree of Life, I would probably not start with this text. Nonetheless, add it to your reading list.