It's nearly impossible for me NOT to compare this to DuRaRaRa!! (previous Naritaverse series), so I won't try. I really love this series, but I'd like to say upfront, i think if you have to pick between watching the anime or reading the manga - read the manga. The anime didn't really add anything, or improve on the base at all, and I felt some of the animation was pretty rough and felt rushed-out. The voice acting was fine, but nothing on the level of DuRaRaRa!! (which has one of the best ensemble casts in basically anything). I don't think anyone in Deathplay really stood outto me as giving an incredible vocal performance, except for maybe Misaki's VA. She was a faily good pscyho. The music was decent, but not "I'm rushing out to buy this OP and ED on iTunes" level (DuRaRaRa! OP1 still a banger btw).
As far as content goes, s1p2 really starts to unravel some of the mysteries in this series at an almost break-kneck pace. There's lots of action, and a whole bunch of interesting new characters, but the chemsitry between them is kinda placid.
This review may come off as being down on this series, but I did enjoy it. Just not as much I as thought I would when it started. And, having read the manga, I wish they had animated some of the epic battles a bit more EPICLY.