IMO this is a horrid manga UNLESS you've played the game... Which is like one of the best Ive ever played. All the Kingdom Hearts Manga are simply shorter versions of the games drawn and directed in as a shonen type manga... I love kingdom hearts and some of the characters, so its fun or funny to watch them do things that you'd never see in the game. It also gives good insight to their personal personality. Also serves as a good reminder of how the story went when playing the new game.
(My ratings are based off if you played and liked the game)