Overrall this new version does a good job at bringing this masterpiece to the DS without ruining the game!
So the new graphics are not exceptional but very nice and it looks good on the DS, so I have nothing to complain on that regard. The music remains the same I believe, if they changed anything you can't realy notice it, and it's a very good thing of course...
The new features in this version are very interresting, like the augment abilities. With this new feature, you can learn abilities from the characters that do not finish the game in the final team, and even some new ones that you can unlock. This is nice but also complicated when you don't know how it works. Fortunately you can search and find details about it on the internet, to understand it better, because you can miss some abilities or rare items that you cannot get later in the game, unless you restart a new game...
Overall Final Fantasy IV on the DS is a very solid game and I recommend it to anyone...
Have fun!