I was very disappointed with this one. It would have been hard to match the sheer awesomeness of Steins;Gate, but I was hoping it would at least come close... instead, it felt pretty generic, the pacing was abysmal (almost everything happened in the last few episodes, and the rest were really slow), and the story itself (when it finally actually got properly started) was just unoriginal, and completely uninteresting. That said, some of the characters were great, the animation and the setting were quite nice, and it did manage to keep me looking forward to the next episode each week.
Overall, I give it 5/10. Completely average. Not good, but definitely not bad either.