This series is one of the best series I have seen. I am watching the series now for the tenth time.
The reasons why this series is my favorite are:
It has a really good ending.
nobody died , Except for the evil one who died by suicide.
There is an obvious brotherhood and some romance.
The fights are really amazing, the best I've seen.
And there is something that bothered me:
in the series Xiao Se lost his inner strength but you don't have to worry about episode 23 / 24 he regains his inner strength and he will be stronger than ever.
In short, you should see it.