The story feels a bit rushed (typical for an OVA I guess) and the combination of violence and cuteness doesn’t fit as well as in Elfen Lied or Higurashi no Naku Koro ni. Also I didn’t like the character design of the main villain (and hope to never see him again, at least not alive) and I would have liked to know of the fate of the princess’s maid, Milano. Otherwise the episode was quite entertaining and I like the overall setting of this fantasy anime.
The character design is very Sunrise-like (which isn’t really a bad thing) and there are mechas in this show (which isn’t really a good thing). The first episode was rather confusing and I guess that the next few episodes will show if this turns out good or bad. It has potential for both.