Animation suffers a bit, character development needs a little work, and a tendency to hesitate during viewing. That could simply be my computer. There's nothing extremely overdone, unless you count someones insecurities. Fair warning follows ...
***WARNING*** Previous reviews mention very adult situations; they are correct.
There are episodes of violence which include: murder, kidnapping, forced sexual situations (none committed, just implied or about to be committed). This series should NOT be viewed by anyone under the age of 17 simply because the situation in which the characters find themselves are of life & death and some really unhinged attitudes. Most kids are sadly finding out about these things all to clearly.
If your younger teens insist, make sure you watch with them & explain anything that may cause them confusion or paranoia. Seriously!! I personally think EVERY parent & teen needs to see this series TOGETHER. Kids function best when they're prepared & not filled with false hopes, misinformation and fear.
This is one of the best anime series I've seen, not full of fluff, but some truly pertinent work that shows all parts of a society, not just pieces or parts. Great job. Need to be more like it, EVERYWHERE!!