I like that this book provides both scenarios and a campaign, and the bunch of extra abilities and perks to use in games. I plan to use many of them for doing Lovecraftian horror games.
This seems to be very well produced although I have not had a chance to print it out yet. The rules seem to be good on a quick read through.
On a personal note I'd like to thank David and Mila for including photos of some of my mini's in this book.