Is not one of the best and is not one of the worst. Is just 4 kids go to other world to save the universe from evilNothing so spectacular the story like i say is OK ,the character are OK ,the action not the best ,the animation is OK ,the are some dumb and idiot moments from the characters and some parts of the animation are not work great (they frozen in some parts).As for the theme song in season 1&2 is not that bad ,but it not work so well. In season 3 the new theme kick ass The most annoying thing in the show is when the reptile come to are heroes and scare them.