I just got it last night, haven't had time to play it.
Please start comments/concerns/complaints/flames/etc here.

Personally I'm looking forward to the storyline and seeing how Saber Lily plays.
And of course Archer and UBW.

Update:

Very fun game, uses a lot of the basic fighter move motions for super abilities plus some others. The AI is pretty good once you crank it up; but for experienced fighters your milleage may vary.

Mission mode is a great way to train yourself to use characters by linking attacks and abilities into combos, learning specific strategies (super/ex finishes, counter finishes, pulling off ridiculous input abilities, etc) and even challenging you to do combos with a minimum ammount of hits; and then there's a bunch of fun minigames you can unlock.

The graphics are very good for a PSP, not epic like a Soul Calibur; but still playable and enjoyable (and yes, Rider does have her bounce effect going on... and surprizingly so does Sakura).

The music is very well done, if you are a fan of the original games/anime; you will recognize a few tunes.

Dislikes:
- this is a PSN download ergo, no manual.
- the game takes a little bit to pick up for specific nuances (Archer's bow mode vs sword mode, some of the counter-to-supers in mission mode require very VERY precise timing WHEN the AI cooperates).

All in all, worth the download.