I really liked the setting, This IRIS things can really make an school manga interesting. But I don't think the way it turned out was the best. Some IRIS are very powerful but not exploited, and sometimes they aren't even used. However, it is overall good and it makes very interesting situations. Good story overall. The art is quite good. Not my favourite style but who cares about me. I liked the characters and though they may be a little too cheesy ind the friendship/love relationships. Characters develope emotions very quickly so it cannot be considered credible sometimes. With this exception which is pretty normal for amanga in which you need to draw the attention of the reader, the characters are well balanced.
Even though I dislike some things it is overall an enjoyable and good manga.