Just the fact that this is a 3.4 million word story that was written in 21 months by a single person. HOLY SHIT.
The Relay 217 Incident is a sequence of awesome, involving a ship flying backwards through a mass relay and the Rachni essentially saying "UR DOIN' IT WRONG" to the Batarians and their biotic ship weapons.
Shepard raised her hand. "I have one important question." Are the Reapers coming? "Precisely." We don't know. But what I do know, is that if they are coming? There's only one relay left that they can enter this galaxy through. The super-relay EDI and I found, so long ago. . . . . if it's another galaxy completely controlled by the Reapers I think we owe THEM an invasion or two, don't you?