I saw much of negative review. Yes. It's failed to exploit the detective side, the fighting scene is unreasonable and failed to bring the thrilling . But at least it have much reasonable things like: why Nagisa appeared, why did she hug the boy she first met, why the Bat guy say most thing concern Siesta when facing Nagisa,... Not too excellent, but good at explaining even the smallest thing.
I just want to say, don't expect too much. Just look at the good side of the anime, it's not too bad to be just 1 or 2 point. Maybe I have been too much positive, but I would still cherished the feeling that the anime brought to me
