A pretty decent watch. This series didn't feel particularly original, in fact it felt like a grab bag of tropes and elements from several other shows over the past decade (in particular I got quite a "Code Geass" vibe), but it was entertaining and for the most part, well executed. Some interesting, if somewhat one-dimensional characters, pretty decent action scenes and an awesome soundtrack by Sawano Hiroyuki (See also Guilty Crown, Attack on Titan, Kill la Kill).

The series seemed to play a lot of things safe but there was the occasional curveball to surprise you (in particular the final episode). Definitely worth a watch if you're a fan of the genre, but if it feels like you've seen a lot of it before, you probably have.

And on the subject of Geass, is it just me or is Slaine essentially this guy?
http://i.imgur.com/4NUHFY3.jpg