I was reluctant to watch this drama at first because I knew from the story that it was bound to get complicated. It kind of felt like the film "Her" mixed with Kill Me, Heal Me, and Big Hero 6, but glad it was different. Nice to see decent character progression. This show had several hilarious scenes and ones that rip your heart out from the betrayal on both sides. I was really annoyed by the medical information, especially in the first few minutes... smh. There were also some just coincidental ridiculous scenes which I understand were supposed to be funny and put pressure on the characters, but I felt like they should have changed those to something a bit more believable or simply less gross. One final thing that always annoys me is Korean people speaking English, or English-speakers not talking normally/too slowly. I usually just skip those parts if I can help it, but they often ruin dramas for me. The only actor who executed this well was Kim Min-Kyu, and to be honest he was probably the actor I kept watching for throughout. Overall, I thought this show was pretty good from start to finish.