I really love this book. I'm also hoping that Wildstar produces a few more supplements.
The plus side is that they integrated Traveller with Lovecraftian horror quite well. The minus is that they didn't provide enough creatures and those they provided are a bit too easy to kill IMNSHO. And they didn't define Shoggoths! :)
I am about to run a Traveller campaign with Lovecraftian elements and this book helped a lot.
One thing I suspect is that this book would mix well with the Orbital setting for Traveller.
[5 of 5 Stars!]