Started playing it today, I disliked some of the voices, but Vaan's voice is quite good, and by that I mean it's not gay. So far I haven't seen anything different from the japanese version, but I haven't looked carefully.
P.S.:The voices of Vaine, Basch and Fran are much worst than the originals. Balflear's voice is apropriate to the character but isn't as good the Japanese one, mainly because Balflear's voice actor in the japanese version is amazingly good.