Story - They did fantastic to sum it up in a short sentence. The only thing they could of done better on was incorperating more of the characters towards the ending of the anime.
Animation - 10/10 solid animation, expecting nonetheless from Bones.
Sound - Can't explain how epic the soundtrack was in words, it was so great, that i downloaded it short after finishing the anime. Just outstanding.
Characters - Only other thing i found some things i didn't like in it, eureka's children were seemingly annoying, couldn't get over how annoying they were. Renton was unbearable at the beginning of the anime almost, he was just as annoying as the kids.
Overall - The anime has to be on of the best anime's i have ever watched, i am really happy i put the time into watching it and is up there in the top 10 animes i have ever seen. It has many morals and themes to learn from it, a even mix of action and romance makes it perfect. Good job bones!