This seemed like a perfect fit for the manga/anime supers game that I'm running; it was an awesome resource. I had already introduced some elements of Deparrment 88, so this suppliment slid into place with no problem.
I ran the module mostly as written and found the range of aliens pretty interesting. This story also introduced the Galactic Police, which could start a whole line of further products on their own; they definitely deserve a sourcebook. My group really liked the NPC hero team on the cover, THE ARMORED DOLLS; pure scifi anime awesomeness!
The writing and pacing of this adventure is top notch and the interior art is well done and fun. We took two sessions to complete the story, but could see it done in a longer 3-act session.
I did feel the need to add a boss-level leader of the aliens, but that is more an issue of personal taste than any failing with this book. I shifted some locations and the McGuffin a bit, but this had negligible impact on the plot, which confirms how solid a product this book is.
If you're looking for a low prep, read and run adventure, this is the book for you!