One of the best in the series.
The battle style is just turn base like everything else. You get to have up to 6 people max in your party, but it like a group turn based battle. Basically if you order to attack 2 characters will attack. If one uses a rune, the other will attack. The music of the game is basically the same but just different music, just the same format of it.
As for the storyline, it is possibly great compared to the 2nd one. The stuff you say to characters still have an effect on them, it is possible to recruit them or you can't because you messed up. If you want all of the 108 stars, I suggest looking at a guide. If not, just follow the story. The battles and monsters gotten harder, you can still earn potch really easily, getting better equipment has been made a little harder. So basically it is just like the rest of the series.