I thought the main character was bland, and side characters were non-existants. The love story bloomed too fast to raise any feelings in me. The global story is mediocre SF, quite far than the movie's explicit reference to Greg Egan. The world lacked soul, what made the series Dennou Coil enjoyable with a similar theme. The initial slice of life is okay, but I got totally bored by the last third of the film, where the hero uses god-like powers to save the world with an orgy of special effects.
I can only recommend it to those that want to pass some time with an average teenager movie made from a very ordinary recipe.