This anime lacks a certain... something... Nothing seems to be horribly wrong, but at the end of the day, it's no more than mediocre. The best word to describe this anime is "bland". It's like drinking water - I don't hate it, but it just doesn't really leave much taste behind. I had a really hard job trying to get excited when watching it because, frankly, there's nothing about it that's very interesting.
Going through everything categorically: the animation... not bad, but not amazing. Music... so bland I can't even remember much about it (though I guess that must mean it can't have been bad at least). The story didn't really inspire. They failed miserably to engage my emotions with their boring dilemmas because they couldn't put together a convincing case about why I should give a toss about it. In addition, parts of the storyline seem a bit muddled up, though that's possibly because my attention was wandering at that point. The characters annoyed me a bit. The police in the anime are a joke. They seem to have no sense of responsibility, and are able to just do things like transfer to a different division without any restraint, as though they are free to do whatever they want. Do they have no superior officers to report to?!
This anime isn't horrendous in any particular category... but it's not really outstanding in any category either, so it's hard to recommend this anime based on any area. And besides, there's a movie out now that's apparently a re-make based on the same source material as this. Though I've not seen it, at least it looks visually stunning, which is more than what I can say for this...