Season 1 to 3.5; 7/10 rating: Negatives: 1. Show is way longer then it should be and many of the character's moral compass is so out of wack that it is difficult to relate to them.

2. The show is not tied very well together. It is just a layer cake of exposition and action, repeated countless times.

3. Characters do a 180° turn on their motivations and actions in seconds. A bad guy can become good with just one conversation and vice versa.

But on the positive side, it does present a brand new story where creativity of writers and animators shines through.

Second half of season 3 and season 4 (9/10 rating): It really gets much better in the end and corrects a lot of its flaws.