I liked the game a lot. I loved the new characters, worlds, and costumes, particularly Sora's costume in the Pirates world. Even though this game was done well, for me it was not without criticism.
I want to actually fight villains and not heartless bosses. In the first two games you fought villains like Oogie Boogie, Captain Hook, Maleficent, etc. But, except for the Organization, they are almost all heartless bosses.
The cut scenes were WAY too long
Also what is up with the new Princesses of Heart? I felt that was unexplained.....Kingdom Hearts 4 perhaps?