This was my first Korean drama and it didn't take long for it to become unforgettable. I've watched hundreds of Asian dramas since then, but this (and a couple of others) still stand as some of the best entertainment I've seen in decades.
You will not be disappointed by this drama - it is in the top group of Asian dramas. The actors/actresses are wonderful, costumes are beautiful, scenery is great and there is nothing I have ever found fault with.