Wow, what an issue! "A breath of broken glass" jumps right into the heart of the action with Batgirl trying to defuse a very explosive situation, but Mirror -like several of the other New 52 villains- means business and proves to be quite violent and lethal. The theme on the first act of this issue makes me pretty confident that by the end of the arc we will know what happened to Barbara's paralysis. The interlude was charged with character developement, and was perfectly handled by Gail Simone. The third act brings Nightwing into the story, which serves many purposes: Separating Batgirl from the rest of the Bat-verse, informing us about Babs and Dick's relationship in the DCnU, giving us some backhistory in the context of the new continuity, and entertaining us with a pretty cool fight sequence. Syaf, Cifuentes, and Arreola were nothing but amazing in this issue.