It's interesting enough at first, and then...Well then it's not.
Okay let's see....The plot is pretty boring, it felt weird playing it, I can't explain why. The characters were weak, the voices weren't so great. The weapon selection was tiny. To be honest, the only reason I bought it was because I'm an RPG enthusiest, and it had an "RPG sale" sticker. That, and the fact that it makes the claim that you can "explore a vast world". More like explore a decent-sized world to an extent, then have your way barred if your not far enough in the main quest, the only quest.
It felt like someone ripped everything that was good out of Ocarina of Time and made it completely lifeless (again I can't explan why). The only good thing about it was the multiplayer. Thus the game is trampled to death by Baldur's Gate and Champions.
Gameplay: 4, it was okay at first, but it was so crappy later on that I might actually pick up Kingdom Hearts again first and be tortured by the overuse of Disney characters. The game sucked and I'm not sure how, but I beat it. I wouldn't recommend it.
Graphics: 5, they were alright for the time.
Sound: 3, pretty annoying sound. From voices to music, everything was annoying.
Replayability: -3 Absolutly none
My advice is don't buy it, don't rent it, avoid it!