In summary, if you like GalCiv3, you will like this expansion. The primary problem with it is simply the lack of new material. Other than the Bazaar, this has the feeling of a well-done couple of DLCs. Not really worth the 20 bucks except for fans of the series.
Fans of CivBE will want to pick this one up. While nothing groundbreaking has been added, the new features flesh out some gameplay from the original, and add the new frontier of aquatic colonization. Perhaps a little heavy on the micromanagement, the overall pace of the game retains that "one more turn" quality.
Tried and true mechanics combine with flexible customization and an interesting asymmetric challenge to create a fun, challenging game. Worth playing for both newcomers and fantasy TBS veterans alike. A dash of humor and sense of progress make the time fly by.