Not among my top 5, but then I never felt the need to share some of my thoughts about my top 5 or pretty much any of the other 150+ c-/k-dramas I've watched.

What I REALLY liked about this one:
1. The father-daughter relationship.
2. The father himself was so much fun and the daughter was pretty close to perfectly played.
3. The assassin girl was super cool and so was her grandfather and the relationship between the two of them.
4. The main villain was great and very different from other villains I've seen.
5. The story was full of twists and turns and surprises and in many ways was a story very much unlike any other I've seen.
6. The flying fish boats ...
7. No crazy censorship slash and hack.
8. The writers did not run out of ideas midway through.
9. Good ending, hinting at a possible second part (I definitely would not mind).
10. Some of the CGI was pretty spectacular.

So, so:
1. The acting of the two MLs.
2. Some unnecessarily drawn out dialogues towards the end (I skipped a bit).

Overall, a bit underrated I think. Just in case you are wondering what my top 5 are, I am not absolutely sure myself. Story of Yangxi palace and Love like the galaxy, definitely. The blessed girl is nothing like these, very different really. Still just in case just like me you are wired to like these two very popular dramas, your wiring may also be conducive to you liking The blessed girl.