Overall:
Story: Actually followed the manga for more than half a season so I'll give them credit for that. Of course it's understandable that pacing becomes an issue with all adaptations, but studios need to realize, following the real plot properly and ending off with a cliffhanger is much better than twisting stories to suit your production timeline and ending with a cheesy plot that just screams dues ex machina at the end.
Voice acting was good in a sense that it just hits you with nostalgia. Some casts though, really need to improve on their acting. That and the script flow between each character isn't very smooth, I'm not sure if they managed to get all the voice actors to voice scenes together or they recorded them individually depending on schedule. But to me it doesn't feel like all the characters were present when they recorded. Conversations are a bit disjointed.
Animation-wise, it's barely passable for a series with so much battles. J.C. Staff has obviously not put in as much money as they did for Index series. Ultra low frame-rates, simplistic drawings for attacks. If it was a doujin circle I'd give it an A+, but for an established studio, this is a D- in my book.
RIP Ken Akamatsu. Seems like you're never going to get any decent adaptations ever. Now the only hope of redeeming the Negima series is to pass it over to Ufotable with a blank cheque. J.C. Staff better have an epic Index installment considering they cut corners with all their side projects.
