A crappy adaption (of a potentially amazing storyline)-- that while it gets painful near the end, you should watch anyways especially for the shounen and adventure lovers. It has a great blend of soundtrack (which in general seem to be a pretty unique sound/set of songs compared to most ED/OPs that are out right now.)
Fight scenes are pretty good, albeit generic. Art style isn't my style, but pretty unique with their curled (boxer?) ears and red noses. Characters are flat, but the seiyuus are pretty great at giving each character some life. Pacing probably would feel smoother if you read the original material (note I haven't read it, so trying to enjoy the series while figuring out why the hell everything is unfolding as it is--- is exhausting. You can put the pieces together by the last episode, but honestly the fact they don't pace well makes this show drop from a 10 to a 7, with a barely meeting "Good" enjoyment.