(spoiler-free review!)
The -music- and -voice acting- REALLY stood out to me as something memorable.

I love how beautiful and elegant some of the piano tracks are.
And the voice acting, man. Sora was SOO expressive with her voice acting that she was the sole reason I picked up this game. After playing through it, I realize that I also really like Miyako's voice.

Personally, I agree with most of the reviews, saying that the playtime of this was WAY too short for its price. It would be far more worth it to get it on sale. I also agree that the story was pretty mid. However, I do understand that this episode is supposed to be a lot tamer, as it is the introduction to the series. I must add though, Miyako's route was really satisfying and enjoyable. I think people are hardly talking about that.
Another thing I noticed was how CLEAN the translation is. As far as I could tell, I noticed no typos or ambiguity in the subtitles, which is unfortunately not something I could say to a lot of VNs, so that's a good thing about this game.

TL;DR
Overall a pretty solid entry to the series. I enjoyed the music and going through Miyako's route. 8.5/10