The plot had great potential but for many reasons the anime just couldn't keep me hooked for more than a few episodes.
Never had I encountered such awkward voice acting. Equally awkward was the music throughout-lackluster, dry, and often inserted at the wrong moments.
And the characters frustrated me(this is just a personal pet peeve.) They were dimensionless, although I can't say much about the main character, Saya, since I never finished the series.
The biggest con for me is that the anime is incredibly SLOW. Again, this is just me, but I like my anime to have unrealistic timelines that doesn't bore me into multitasking while watching an episode.
Disclaimer: I realize that I have not seen all the episodes so my opinion is partial, but an important criteria when judging a show, to me, is that it captures the viewers into anticipating the next episode. The above was what I got from the first few (5 or 6) episodes.
Verdict: good plot, terrible delivery. 2/10