Very fun, short read for fans of The Force Awakens. 
 As expected, there's not too many revelations going on. But you get a brief taste of our new main characters before the movie. 
 While it doesn't give the rich history of the galaxy between Return of the Jedi and Force Awakens, it does flesh out some finer details on the overall course of events and the present standing of things. 
 Some of the (highly nitpicking) complaints about Finn's character and abilities are easily explained, in near enough the ways I and others had assumed they would. But it's nice that the explanation is canon, and not just going to be labeled as "excuses" during very important internet debates on whether not the movie was good ;)