The idea is pretty neat all and all but lacks that technique, that experience, that will keep the machine running.
Story - It started really good as a blend of Gantz with Full Metal Alchemist and level until episode 10 it felt interesting, but after that it goes downhill. It gets lost on over dramatization, enormous flashbacks that don't matter because all the characters are completely one dimensional, and the fights become Dragonball Z-ish (in a bad way). But still, as any fast food, it will keep you addicted, mainly for the mysteries.
Art - They copied the art style from the manga, which is pretty bad, added some amazing lights and effects and that's it. It worked, but there's nothing incredible.
Sound - The soundtrack is superb, the first opening is already enormously iconic because it's brilliant. Adding to that all the other themes are awesome and adds a lot to the scenes.
Character - Flat. One dimensional. Boring. Mikasa may be the most bland and boring character I've ever seen.
Enjoyment - It has some pretty good ideas that will keep you going, but overall, not that good. I mostly enjoyed it from re-imagining how to make the combat feel more intense.
