i thought it was done really well. the ending was kinda eh, but understandable since the manga is still running without any clear end in sight. kinda interesting it was done by the same animation studio as FMA as well...but otherwise, they were pretty faithful to the original manga for a good majority of the series, and i think the Japanese voice actors did a wonderful job portraying their characters
3nodding (i'm trying to find more justifications to watch the dub though; some voices annoy me, but i shouldn't let that stop me)
besides, there are some moments that are just 1000 times better animated than print XD like the Soul and Black*Star vs Kid battle near the start.
"SOOOOOUUUUULLLLLL~~!!!!"
"BLLLAAAAACCCKK*SSSTAAAAARRRR~~!!!!"^ comedy gold, i tell you. also, the entirety of the exam episode XD