Story:
The plot was rather garbed and a bit hard to follow. In the first half the plot follows the "enemy of the week" format before leading to a rushed climax. However that was expected since the the first half of the plot had to introduce things. The 2nd half was better paced and had a more coherent path along the plot. While not exactly original, the story amalgamated enough ideas to make it seem interesting. Overall the pacing felt uneven (at least initially) which made the plot feel less favourable. Honestly, the story itself would've been amazing if the first half wasn't so butchering.
Art:
The character designs and art direction were very well drawn. Nuff said :P The main character's design was well done and striking.
Sound:
Music was great, the first song ever heard in the series was enough to get me to listen again and again. While OPs aren't my thing, the overall soundtrack and folly were well done in the anime itself.
Character:
There were indefinitely many problems with the main protagonists. Their overall characters were quite lacking in personality. Even though this allows for exploring side characters there is no growth in the main characters themselves, which leads to out-of-character actions. That was another problem in the plot, which was driven by the character's actions. The concepts for both characters had potential and were very interesting. Without going into spoilers, they fell short.
Enjoyment:
There was enough violence, art (I'm a fanatic), music and action in the anime to enjoy it greatly. Again, the plot and main characters hampered it. The fanservice was taken to high levels (for mild art).
Overall:
Watch it! If you don't mind an odd plot or bad main leads but enjoy the rest, watch it!
