While i really do like the main trio of this game and the way this "friendship" is portrayed even in spite of them not really being able to experience emotions, the gameplay was an actual chore, after getting some mobility and new keyblades it does get a little better, but it then gets instantly worse due to the amount of badly designed enemies and bosses.
Play this only if you are REALLY into Kingdom Hearts, but I wouldn't recommend the movie either because some aspects are far more immersive in a gameplay form, like the final battle against Xion or the fight against Riku, which even if horribly designed, were pretty cool given the OST and various story elements around them.
It is a DS game so i'll be way more lenient than usual with this but I really wish they remade 358 instead of CoM.