Of course, it has the best bonus mode. Though the magic runes and other gimmicks didn't really bother me (they seem to be most people's complaints about it), what bothered me most, other than the heavily animeised characters/script/artwork, was the level design of the game. Then you have other stuff like a lot of sprite reuse and uninteresting backgrounds/tiles, and the game being kind of an unnecessary continuation of Aria of Sorrow. Though I guess that last one is nitpicking.
The soundtrack also wasn't as stellar as most titles, but it had some really neat songs.