The short answer to that burning question is: if you love CG for everything that is not mecha related, this shows it´s not for you, the appearance of OP characters can be easily missed and it has nothing of the brilliant strategies and reflections about justice, power, treason, etc... Also, very poor writing, far away from the original series.
Now, if you love mechas, this series it´s spot on. The animation is incredible, and the fighting scenes with the Knightmares are very well made. In this show, they removed most of the greatness of Lelouch and his machiavellian personality and strategies, but they compensated it with great action.
That said, I gave it a 5 overall because it carries "Code Geass" in the name, and as a CG spin-off, it´s not good. Also, all that the main series presented as lore regarding the Geass, seems to be thrown away. At least I couldn´t understand a lot of things in this series, they use the Geass as a justification to name this spin-off but it doesn´t make sense.
Very poor writing in that regard. That´s why my score for Story will be a 3. Nothing regarding Geass in this one makes sense, and not to mention that the villain is the more generic villain a story can have: the "I want to destroy the world just because" type. That´s just very poor and lazy writing.
In the end, I think I wasted my time watching it. Most of the reviews I found said the contrary, but besides the great action scenes, it´s a very mediocre story.
