The art style and animation were nice-looking, but not exactly what anyone would call 'groundbreaking visuals'. The opening/ending and OSTs were nice enough and helped carry the mood of the anime, but I wouldn't listen to them as stand-alone music. The plot was interesting and enjoyable enough, but again, did not exactly stand out. Etc., etc. Basically, it was a fun enough ride to not consider a waste of time. I'm just not going to fondly regard it as a masterpiece anytime soon.
On to the stuff I liked. I liked the idea of the country basically being run by different factions that are ruled by superpowered "Kings". It was a concept I'd like to have seen more of, honestly. Some of the characters were also very fun to watch, especially with how our main character didn't project the same aura of blandness that a lot of other shounen protagonists emanate like crazy. I like the secrecy of his character, his friendly charisma and willingness to glibly lie out of situations. It's charming, in a way.
The saving grace for me was the relationships and interactions between characters. Seeing the devotion some of the characters have towards other characters can be pretty heart-wrenching.
I didn't particularly dislike any particular aspect of this anime; I'd just find it a little lacking in intrigue.
All in all, I gave it a 6/10. I'd give it a watch if you're looking for something to do, just don't expect anything spectacular.
