This Review is for the entire series 1-18
What really carried this series to the end was the story. It was captivating, interesting, complex, and had large amounts of character development. Though some characters are underdeveloped and the main character Xin seems to fade from the spotlight at times (kinda like in Naruto where the main character is not always what the story was about). It was still very well done and the ending tied things together well.
The sound was good and the voice acting was excellent when compared to most amateur voices you would find in flash animations.
The graphics are a hard one to judge. For a flash animation it's incredible, but there are times where there are small yet noticeable inconsistencies with hands or faces. Though animation during fights are intense, fast, and fun to watch so they draw you away from the flaws.
Wow I wrote a lot O_o