First-pressing comes with a CD containing the theme song (by Koshimizu Ami) and another should-have-been-DVD-commentary track featuring Koshimizu Ami and Nakahara Mai, a pretty high-quality Arika figure, and apparently picture label on the DVD.
I guess the animation is okay, but I watched it back-to-back with Kanon, so it looks pretty bad in comparison. My sense of average is out of whack, so I'm not going to comment on it further.
As for story, I don't really care for it. Maybe it's going somewhere. Maybe it's not. I don't think I care that much either way. Figure's kind of nice, though, not that I care much about that kind of stuff.
Arika's patented running pose. (EF 100mm f/2.8 USM Macro @f/11, focus on her eyes)