Definitely worth watching for every fan of Lee Joon Gi and historical dramas, as well as fantasy. I wasn't sure about the series at first, as it's kind of old for me now... but I gave it a shot and did not regret it. The story is great, though I don't like the "heaven" parts that much, the acting is great with exception of main female villain. The chemistry between two leads was strong and I was very satisfied with the happy, yet original and not very predictable ending, as well. I saw better dramas, but this is one of the best historical ones, for sure. Reccomend it!