We had crappy weather here Saturday, so I managed to get through the whole thing this weekend. I thought it was pretty solid as a whole. Some interesting stuff going on (Especially that one development at The Citadel...hopefully that will come back in a big way rather than just fading out. To me that was maybe the most interesting twist of the entire season.) that I'm interested to see what they'll do with in the future.
I agree with cookster's spoiler, and there were several other things that I was just like "come on, someone who's supposedly that savvy would NEVER do THAT," but hey, it's TV.
I was surprised that the narration thing didn't bug me after a while but overall I thought it was ok (I was afraid it was going to end up being a crutch for sloppy writing/plot development, but for the most part they avoided that.). The only time it started to annoy me was when the writers couldn't get out of their own way with beating you over the head about how bad Frank is. Sort of like the end of the pivotal scene with Russo at his house. It's strange, most of the time the show is pretty well written and subtle like they know their target audience is sharp and they give them credit. Then you get these odd instances where they wield the script like a blunt weapon. I'm sure they're trying to add that extra little punch of gravitas, but they end up being melodramatic eye-rollers for me.
I was pretty impressed with the production values, and it was miles ahead of Homeland regarding certain things being believably in/near the District. There were a few things script wise that were off, but they were fairly minor (though easily avoidable) and you'd probably have to know the city pretty well to catch them. They did a good enough job with depth of field and framing the shots that even the DC scenes that weren't DC were close enough visually.
I'll definitely keep watching.