I freaking love the game.Great. I loved to play it just like a regular single player JRPG. The co-op feature is helpful if you have some difficulties with bosses or domains though. It's sort of easy mode. ;)
Only thing I don't know how I must do it is let people in my game. I always join there's but they not mine. And I need some help with some puzzles.
But still I love it