This review is pertaining to the wii version of the game and I'll keep it short and to the point:
Story is pretty good. It doesn't seem too serious, sort of in the same vein as Sailor Moon. The graphics are bright and colorful, mostly consisting of anime sequences interspersed between static 2D backgrounds with anime portraits laid out on top and a lot of spoken and unspoken dialog.
Gameplay consists of fighting 3D battles SRPG-style at the end of each Episode (8 Episodes total) and each episode probably ranged, on average, 2 hours in length (keep that in mind when playing the game--doesn't really go well in short bursts). On the bright side, you can save your game at predetermined checkpoints at certain points during each episode.
**Despite what people think, the game is not in 480p in the wii version. It is 480i and in 4:3 mode (non-widescreen) just to clarify that bit.
Music can get a little repetitive at times, but the overall composition of the tracks are done fairy well and fit the mood perfectly.
Controls, at least on the wii version, when doing quick-time-events during dialog scenes can be frustrating. You have to move the analog (nunchuck) stick and on the wii remote, the dpad arrows a certain way in order to pass the little events. It can be frustrating because the remote dpad doesn't really move well on a smooth axis, if anyone can understand what I mean.
Help support NISA and this game. It's really unique. I bought this version with the hardbound artbook from RosenQueen's website (NISA's official page), and don't regret it. If you can't find the wii version, then get the ps2 version, but the definitive version to get, if you must (and if you own both consoles) is to get the ps2 version because it is in a box set with a poster, and two language track discs (english and japanese).
**The wii version only has the english language track.