In spite of having understood who the murdered was half way through my reading, it was such a good thriller. It definetely sent chills to my spine more than once. Plus, it didn't get stuck solely on the thriller genre, as it dug deep into friendship, family, sacrifice, justice.
Satoru got on my nerves at first (I think that was the exact intent: portraying him as a nasty, bitter man who has issues in bonding with others), but I was amazed at his development throughout the story.
Not only was his going back in time the pretext for the whole thriller and for solving the case, but also his chance to reshape his personality and his future life, and I really liked that. Something I really appreciated, which I found in Orange as well, was the healthy portraial of Satoru's relationship with his fellow classmates and friends. What went across my mind whilst reading was": Here, that's someone to be proud of".
What I didn't like: the plot was a bit messy at points, as was the dialogue. That resulted in having to read the same page more than once in order to get a passage or a hint that was, in some cases, crucial to the story.