So I finally dared to take a look at the first episode and while it was a nice episode, I didn't feel that it was anything out of the ordinary so as far as first impressions goes, this was pretty much an average start. Yet it is still rather easy to see places where they are trying too hard make the characters "moe", namely at the start with Yui landing on her ass. I seem to also think that the animation is more of a mimic from A-1's style of lightly drawn and floppy movements than the usual Kyoani gloss and effects.
Mio is also an obvious pick for me, like so many others...with an uncanny resemblance to Yomi
Though it seems that the series is bais towards her anyway looking at who is the main star of the ED.