Story: A heartbroken woman in modern world suddenly time traveled to Goryeo Dynasty after drowning and woke up with Hae Soo's body. The plot is full of politics, love stories, family issues and tragedies.

Acting: Both leads did amazing in the series, as well as the other side characters and villains. However, there were few noticeable unconvincing acting or lacking of intensity emotions to some, especially in the last episodes of the drama.

Music: I love most of the sound effects used with catchy background music / osts.

Rewatch value: It's not rewatchable for me but i might wanna watch Jun Ki's scenes as he's really good looking in this drama.

Overall: What made this drama memorable for me is only the ending, some may hate it, some may love it but directing wise, it was an impactful one. It's one of those series that will make you feel sad whenever you remember it because of the ending. Kudos to IU and Lee Jun Ki for giving their best in creating their roles that will forever remain in our hearts and hopefully will remind everyone to not regret things and keep giving all our best in the face of challenges in life. Despite the traumatic ending, Scarlet Heart Ryeo isn't memorable as a whole. IU's character was all over the place and I couldn't understand what her goal was or what she values. Sometimes she values her life, sometimes she doesn't, so the things she did was a bit confusing and made me question her decisions in living in the palace, then staying away then back to living there again. The progress of Hae Soo and Wang So's (4th Prince)relationship was not as convincing like her and Wang Wook(8th Prince)'s initial love story, even so, they were still cute and believable because of their acting. The first few episodes were full of wisdom or quotable quotes but then faltered in the middle until the end because the focus was directed to the brothers fighting for the throne and giving us tragedy every step of the way. Even with the devastating events, i wasn't fully invested with each story as i felt detached or the flow of the story didn't make me feel connected with some of the princes' while IU's modern character had no explanation whatsoever as to what happened of her 'coma' like how she was saved and what happened to her best friend, boyfriend etc, where she's suddenly awake, back to working and with snippets of her 'time travel' experience via her dreams, which felt rushed and left me more confused. Quite a bit disappointed but still happy that I got to watch this drama, so my overall score would be 7-8 stars.