Kingdom Hearts II is a masterpiece that you won't stop playing until you will finish off every part of the game
The storyline may be too mysterious at the begining (if you haven't played chain of memories) but nearby the end of the game you will understand it.
The gameplay is the best action rpg that you can wish for. Levels, equipments, potions and magics are the basics of a good action rpg game, and kingdom hearts makes it even better with the forms of Sora.
The difficulty is just right. The easy mode can be a piece of cake even for begginers, and so makes it a game for everyone.
The graphics are not of a level of Playstation 2 at all. They are better than the Wii graphics and showes us that with a bit of work, PS3 didn't improve the PS2 by lot.
The voice acting is great and the background sound is quite good and brings you to the atmosphere of the place.
To sum it up, KH2 is a superb game and every gamer is eager to continue this flawless adventure.