SPOILERS. Proceed at your own risk.
It was a nice read. Stakes are really high. I didn't like Guardians' decision to leave many sectors without Lanterns and shift some of them elsewhere against their will. I felt very sad at the end when it turned out Jo was only Green Lantern on Oa (except Keli). Poor Corps, they cannot have a day without being in ruins.
Also, did that invader have Mobius Chair?