Though it has some minor plot holes (and which drama doesn't have), I really enjoy every moment watching it. The overall story makes sense and is catching. There are critical moments that really got my heart.

The music was amazing by the way! And I love the ending!

Also, as a Chinese language learner I usually watch C-dramas without translated sub. I have usually been going for modern dramas, since they are easy to understand. But this time I tried with this "historical" drama, and it was not hard to understand either (of course once in a while you need to look up for some difficult idioms). Maybe because the story was not too complicated and the language use was quite simple. (Of course I don't mean to learn to use the language in "historical" dramas, but only to test my understanding).