Star Wars X-Wing: Ghost - Rules of Play says:
The Rebellion’s Ghost Expansion Pack introduces both the Ghost, a steath based star ship from the expanded universe, and the Phantom, the Ghost's small and agile attack shuttle, along with pilots and crew representing the heroic protagonists of Star Wars Rebels.
Star Wars X-Wing: Ghost Review:
Unfortunately there aren't any reviews of Star Wars X-Wing: Ghost yet, but why not check out the publishers website for more info.