The plot is very involving. It twists in all the right places, and it's perfectly synchronized with the exciting pace at which things develop. You literally don't feel the 26 episodes pass you by. Despite everything that's happening, viewers won't get lost in the plot because it is clearly presented. There is never a dull moment in VOE, and this is the way an anime series should be.
Every moment is packed.
You get a combination of great dialogue, mecha and human fighting action, magic, romance, humor, and drama. Character development is at a high level. There are no ornamental characters, everyone has a distinct personality and purpose in the story. The art and animation are excellent. Some of the scenes are even enhanced with a bit of computer wizardry.