The art is a little different from the manga, it's a bit more "round" (especially Sakura's eyes). There's a lot of characterization in the manga art style that really helps to emphasize scenes, so I'm hoping they don't stray too far. I always get a kick out of Rei and Sakura's lying faces, and Toki is always drawn with a smirk even when he's in full badass mode. The rest of the characters have their own equally interesting quirks.
I'm also a bit worried about censorship. It's not really a fanservicey type of story but a lot of the fights are pretty brutal, especially in the more recent arcs.
I hope there's a PV soon. ^^
Also, it's not really a manga spoiler to know this, but I'll tag it anyway: