I had low expectations about this title coming from Never7, which were kinda confirmed at first. The first playthrough felt eternal, but I loved the (Sora) ending. After that, I really liked completing the other endings because of how they make you understand the characters and the whole picture.
Then, I went for the true ending, and man it felt slow, but once it gets started, it's trully a mindfuck. You think you know how the plot will end and then they throw you plotwist after plotwist after plotwist, until you are afraid to think that a human mind could actually create such a story. Kotaro Uchikoshi, you're a fucking genius.