Nicely organized: Chapter and section headings match what they are about. Also, an index. This might seem like an odd point, but... I've seen some things over the 30 odd years that I've been gaming to lead me to believe otherwise.
Pretty pictures: Stills from the show showing the topic at hand, also, the schematics of the Galactica and Colonial One are nice.
System: While not a huge fan of the system, it seems workable.
The tonality: Nicely done, and the way it's written, brings home the points of the series. While no direct comparisons are made, the point is brought home to avoid the technobabble - this is not Star Trek, where the problem of the week will be solved by reversing the polarity of the subspace transfusion warp capacitors, the problem will be solved by people.
Ship Design: Rules forthcoming... want to design your own ship, or fill out the fleet? Wait till that book is published, or, do what I'm going to, and fudge the Serenity ship building rules.
Sometimes the "in game" tonality of the rules is a little intrusive. On some occasions I find that I feel like Saul Tigh is growling the rules at me... take that how you will.
The Quick Start rules feature an introductory scenario, and sample PCs. Perhaps a continuation of the scenario and more sample PCs would have been a good idea.
Edited to add:
Among the other Good features is a lexicon listing common terms from the show and the game, like what exactly DRADIS stands for.
There is also semi-official support at this website: cortexsystemrpg.org, which includes the official errata list.
I'm not a grammar or a spelling Nazi... but dear lord, for the price, and coming from professionals, I expect more. There's a typo in the introduction by Richard Hatch ( which, by the way, I think is pretty cool that they got him to write one). There's misspellings, the wrong use of words ( I don't think the character is "knew to the fleet"), lack of spaces between words, etc. I had the same experience with the Serenity RPG - the feeling that the book is already late, and there's just not time for one more pass by the proof reader. Well, for the record, take the time.
Why the 4 star rating? Because they don't offer a 3.5, the bad and the ugly don't outweigh the good. A statement up front that the RPG only covers the events of the first season (and I'm not sure it even goes that far) would have been good.
Hopefully, later printings will see a cleaned up book, and the supplements will fit out the cracks. A search on Amazon shows a GM screen for the game, but no due date.
I'd recommend this game for people looking to role play in the reimagined BSG universe.