Well, to me, Kyoukai no Kanata screamed "Fate!" to me most of the time. But besides that, I'm pretty in good terms with the tamed fanservice despite the imouto fetish and glasses fetish in the anime.
Moreover, during battle scenes as well as regular scenes, this anime can easily become an AMV fodder to AMV makers out there. Fluid battle scenes with pouring effects colourful blinding my eyes 0.o (no typo or grammar mistake there, I literally made up that mehehehe).
So I could say that this anime is quite nice. However, it is not a "gateway" for anime. I recommend this anime to those who wants simple, beautiful fights with leisure atmosphere.