This was one of my favorite new shows of the last two seasons. It's a shame it got cancelled (twice), but at least it was given a chance to resolve its story arc (except for the inevitable civil war which would follow the finale).
Recoil is right; it did move fast, but I was okay with that. The slower pace of the first season allowed for more character development and gradual revelations of the underlying mysteries, but the 2nd season felt very meaty and tightly written but without sacrificing all heart. In fact, I think it was seven episodes, not eight, so it successfully did what it needed to do in very little time.