The book overall is a great buy, the amount of value packed inside is worth its price (honestly should be $10 minimum and I'd pay that happily).
The content overall is great, it condenses the lore of the Gargoyles into one book, offers some new content in the form of a new Attribute (optional). some new merits and flaws.
I'd be more excited about the Disciplines content but 3 of the 5 Elder Disciplines are from the 1st Edition book and are updated, 2 are new so there isn't much in the way of new abilities. The Combination Disciplines are a nice touch 3 are brand new, one is actually an Elder Discipline converted to a Combo Discipline.
One of the biggest hits against the title for me is the lack of built in references (so I can just click on a name in the Table of Contents and jump to it while on smart devices) or a lack of Bookmarks (for when I'm on a PC or laptop). A more fleshed out Table of Contents would be greatly appreciated as well. I ended up adding my own after purchase just so I could properly jump around and review things easier.