An excellent game that lets you play the way YOU want to play.
1. Game lets you play how *you* like. If you want to make it hard, you can reduce your level and increase difficulty for better drops and more fun. You choose whether to focus on fast reflexes, or on powerful gear, or on strategy.
2. Deep combat system, which forces you to make a lot of choices. If you want to improve your skill, it will take a very long time before you feel you learned everything.
3. RPG part of the game suits my taste. It has good story, and none of the boring RPG elements like grinding, being crazy overpowered due to high level, etc.
4. Lots of unique features that are fun to learn about. Certainly, not a rehash of a standard action rpg formula.
5. Excellent music and overall feel of the game (even though I usually don't like the setting of a modern city).
Here's what I thought could be done better:
1. Characters are decent, but could be a lot better developed I think. Especailly given that the story is very interesting!
2. Sometimes the battle requires a bit too much button mashing.
3. Very little feedback is given on the most interesting part of the game -- combat. I wish it was easier to tell what caused different status effects, how much each monster hits for and is hit for, etc. Also monster behavior is fun, but again sometimes it's hard to tell what's going on.
Overall, I think it's one of the best DS games ever. I would rank it along with Mario Kart, Advance Wars, etc., and way above FF Crystal Chronicles RoF and all the other FF games that were released on DS so far.