Fantastic game, truly a fantastic game.
I would call it a masterpiece, it's very close to one. But..
There's a few performance issue in a couple areas, no big deal.
Some people are moaning about translations, but I don't have any issues there.
I have to knock a couple off points off though because a lot of the characters seem kind of useless, which is a shame. There's tons of people to recruit and it's great fun finding them and getting them to join, but, you'll maybe use 10 - 15 and the rest will just be knocking about your castle.
The story is also fairly typical of these style RPGs. Big Bad - Fight Them - Save The World. It's told well though and the voice acting really adds a lot too it.
Over all, I'd happily score this game 4/5.
If they iron out the bugs and performance issues, it will be about as close to masterpiece as any game released in the last year.