I'll admit, it's been a while since I finished this series. This was one of the first Korean shows I picked to watch. I found it absolutely amazing. It constantly surprised me. I loved the acting, the music was great, the story line was interesting, the fight sequences were well done, the special effects were surprisingly impressive, the pacing was spot on and, oh my god, that bad guy was top tier in my book. As is the norm with Asian shows there is always a touch of cheesiness sprinkled in (which is not to my personal taste), but it wasn't overbearing so I honestly could overlook most of it. I do strongly recommend this one. It was an overall great show to binge.