Good battle system, good use of stylus, good game.
The battle system is turn based. Unfortunately, the battles are of the random encounter type, where you'll be walking and then BAM, all of a sudden you'll be transported into battle. I guess this is good if you like that kind of stuff, but personally I can't stand random battles.
Lucky, the magic system is pretty good, and the planet system is a unique way to take advantage of spells when certian planets are aligned in the right places in the solar system. And the spells all have spiffy neat effects with fireballs and thingys flying all over both of the DS screens.
According to the game if you tap your character before they get attacked, you will not recieve as much damage and also, you will give more damage to enemies if you tap the screen before you attack. So far I have had mixed success with this.
The story is lighthearted, humorous and well paced. I'm just nitpicking here, but I wish there was a little bit more character developement so you could get more attached to the characters.
This is a good RPG for the DS. I'd say check it out if you like RPGs and don't mind random battles.