This drama is really hard to review. It started out very strong, with an interesting story, a great main couple, and good supporting roles.
In the last 1/4 it didn't go directly downhill, but it became a little "too much" of everything and was sometimes annoying.
All over, it was a good watch and the first 3/4 were great. I liked it.

What did I like?
The main couple, they had great chemistry and their relationship was complicated enough to be realistic. I liked their growth.
The supporting characters were mostly well depicted and did add to the story.
The OST was good,
The storyline was good and got me hitched from the first episodes.
The fights were well choreographed, smooth and strong.
I liked the way the sound-strike was shown, it worked well.

What did I like less?
The villains were too dumb.
During the last 1/4 it got repetitive. Someones origins would be revealed, they would fall in a trap (probably in some cave), someone would get hurt badly and fall in a coma, Lige would be weak and keep dying ...
Some characters were extremely annoying (for example Weishengs little "didi", he/she was annoying in every way, to much makeup, obviously a girl (how didn't he realise over the years?) that became even more annoying when revealed as such).
Perhaps there were too many sidestories.