I loved kingdom hearts 1 and 2 and I'd been looking forward to this game for a long time, but was very disappointed when I actually got to play it. Almost all I got to do was watch cutscenes, one after the other, with a little gameplay in between. The cutscenes themselves, while beautiful, felt uncomfortable and had unnatural pauses between dialogue.
The combat of the game was not only too easy but also too simplistic. All I did was mash X and hit triangle every now and then so that I could continue to mash X some more.
The story did wrap up all the stories from the other games, but it mostly just repeated the idea of "we're friends and if we stick together we can do anything."
All in all I wouldn't recommend this game.