They're good, but a little dated. I can only talk about the original two, but at the time, it was just refreshing to play a game that you thought would suck, but ended up being pretty fuckin' good.
That said, the combat has not aged well, and it gets repetitive quickly. I played a bit of KH2 recently, and while the worlds are still impressive, and polished, I find that it's all masking a very basic game. You do the same shit over and over again, and the only thing hiding the basic nature of the game, is the WOW factor of the presentation. I know that sounds like every game, but this one particularly stands out. There is no strategy to the core gameplay. You just run around the city hubs collecting shit, and then just mash a button in combat the whole time. When you die, you don't feel like you fucked up proper. You just feel like you didn't mash the button enough, and vice versa when you win. It's all very basic and hectic.
Still worth a look though. It's still very impressive to look at, and the story is enough to keep you plugging away. Just don't expect the action/RPG elements to be on the same level as the cream of the crop.
