I just finished reading this translation and was delighted. I can hardly believe the difference this excellent translation made! Reads just like any epic poem (though there are some footnotes still required!). I really enjoyed reading this.
Can't comment on the supplemental information because I did not read it. I just wanted to read the new translation.
I have read the book (I recently just finished the book), and it is an excellent read if you are a fan of epopee as I am. I have allowed my nephew, whom I have recently exposed to epic poetry (i.e. Iliad, Odyssey. Aenied, Paradise Lost, Divine Comedy, etc.), to read the book; and, while he is a much slower reader than I, he assures me that so far he is enjoying the book. In fact, it will probably be some time before I repost the book, as I also have a good friend wishing to read it next.