first half of the series are seemingly isolated cases in episodic format, you could say their quality is subjective I guess, as far as police stories go they weren't even CSI tier. well it felt like I'm watching anime version of bad CSI episodes then. the cases tie into each other and future, that was good but the cases and characters weren't any good. Worst of all was Akane as the noob inspector leading all this.
second part with riots and everything, after like 11 episodes or so, you finally see some story direction, that is if you haven't already dropped out of boredom. The second half is filled to the brim with overly long and inane scenes of book quoting that are all pile of nonsense, it all comes off as pretentious in place of 'smart' dialog which was probably their intention. All of the are just filler, yes that makes the pacing of episodes and the series extremely poor, weeks by weeks nothing ever happens just talk talk talk.
And the ending is extremely underwhelming, squandering at one point promising villain. The plot revelation you could see coming from well before and well it's urobuchi, he has done the same thing too many times now, I bet aldnoah.zero has the same twist.
the hideous CGI and coloring, inconsistent faces in a same scene even and all the other production problems added on top of above, it's a mediocre at best show. it could have been better if it was half the episodes, there were like 3 EPs I liked overall. that's lower than average for me at least.