The fight scenes are awesome, and a lot of characters are cool.
I love how Ruby brings Weiss to the edge of sanity so often, and the antics of Nora and Lei.
The creatures also look awesome.
The downside is that they had to go through the whole 'magic school' shtick, so when there is no fighting it looks just like a lesser version of soul eater. And the humour is hit and miss, hope they're not afraid to use darker humour.
Also, the black background characters creep me the -blam!- out.