I'm a big fan of FF saga, and I liked the mix of old and new things in this game.
Old: the crystals, the jobs earned gradually through the game, the random encounters...
New: the battle system (in many case you can't decide the target for your single action), the "Crown" upgrade (you learn abilities with gems, while battling just makes you levelling up), no chocobo (they were in EVERY Final Fantasy, so it's not tragedy they're not here even if they're pretty)...
The graphic is cute, but the game is not baby-easy: if you don't pay attention you can get ko'ed quite easily, especially in the first part when the heroes act separately. In the second part you have the whole party of four, and finally you can start playing at the fullest, and you also can find an item that double exp. points, in fact before battling the final boss I have levelled up quite fast.
The music are very nice too, never boring.
The plot is a bit weak, time to time, but really, the fun is fighting and levelling up, I don't care if the crystal tale has already been told!
5 stars, I enjoyed it very much and I recommend if you like Final Fantasy, and also if you want to play a solid RPG.