Watching this after reading the novel alone would have been painful, however after watching the live action adaption I can consider it acceptable. The lack of english subtitles means I can't speak of how the dialogue itself effects the work but I know the characters and plot fairly well so I feel I have some credibility.
The fast pace is good considering the original and live action had pacing problems but not much content is covered at all. The series hits a thankfully climatic scene but only covers beginning arcs.
The adaptional changes do seem odd, but don't hit unacceptable as the live action did. They start
to add up towards the end but so long as the future characters and arcs are preserved I wouldn't mind the few changes.
The art itself isn't bad, the animation lacks a little in quality, passable most of the time but early action scenes suffer, there is a noticeably stronger effort towards the end. graphically speaking the characters are well done, the effort put into background and extra characters is also appreciable.
The few minute 13 episodes it got doesn't do the original justice but it does effectively display what it does cover.