Full disclosure: I was the proofreader for the document portion of this product. That said, I only saw a small glimpse in preproduction, and am truly impressed by the complete product. The document itself is only a minor portion of this gaming aid.
The maps - and there are literally dozens of files - cover every square centimeter of a large space station. If your players need to meet a contact in one of the cafeterias, covertly find & search an apartment in Sector H3, or speak to the head of Security in his office... you have a map for that.
I particularly enjoyed the d66 tables of prominent features, souvenirs, exotic dishes, and exotic drinks which allow the referee to effortlessly add local color on the fly.
You want to let your players roam at will, and the Perfugia-Class Space Station lets you do just that with ease.