Action-based battle system is excellent and there's lots of choices about how to setup your party.Its a girly story tho.
Having said all of that, the story is often ironic in tone and my sense from other reader reviews here is that they didnt get that. The story we get is not to be taken seriously -- its basically a cartoon story with "sexy girl rock stars looking for adventure." Some will hate that, but personally I just ignored the storyline.
The game intentionally re-uses the locations from FFX and then shows how those once remote places have becomes tacky tourist hotspots. Its an amusing twist, and Square deserves some points that it can poke fun of its previous storyline. Folks dont take this game too seriously and enjoy the combat!