This is a fantastic book, with sky-high production values. The indexing and arrangement of the items is probably the biggest strength - it is fast to find everything in the book. I love that it includes items from all the other core books, so that there is no need to go hunting between books for elusive bits of kit. This is one of the few hardcovers I'll actually tote to sessions for my players to look through.
The print version looks good, I don't think it would stand up to too much writing and erasing. The PDF should be editable - without that it's not much use. Good idea, but the last 10% of polishing the product is everything in this case.
This book isn't terrible, but it's a cut below the writing that can be seen in the rule books and modules. I'm not too big a fan 1st person perspective, and I found the character's internal monologue to be unconvincing. A younger reader probably wouldn't split hairs in the same way, and would probably be very happy with the comic-bookish action and story flow. I put it down about 1/3rd of the way through.