Overall, to me it was an entertaining series, nothing too special but also not as bad as some vocal minority makes it out to be. It was one of the few currently running series that tried a realistic approach to shoroms, which means no comedy focus, harem or supernatural bullshit. The art was rather unique (at least I don't know a similar style) and of high quality, especially the facial expressions, which conveyed emotions better than any dialogue. Points of criticism for me are the nerve-wrecking (later on, deadening) drama pace and Yuki's passiveness in the 2nd half.
I, for my part, am looking forward to SK's next work.