I watched a lot of kdramas and this one is definitely my top 3 all time best. As long as you don’t mind stories on psychopaths, its a must watch. I think I have rewatched it 4 times by now. The acting, storyline, and production is really good. Heck even the music is good lol. Every single episode is very captivating, never a single dull moment. I’m the type that 2x speed “so-so” series, 1.25x speed “good” series. With mouse, I became a good girl playing it at normal speed and even rewinding just to make sure I don’t miss a single word.