Now I'm just more concerned that people just rates this show poorly because it had low viewership ratings. 1st of all, viewership ratings shouldn't be included when it comes to rating a tv show by its quality. I am not a robot and tomorrow with you are just two examples from a long list of shows that had low viewership ratings, but are really good shows.

Story
This a fucking melodrama for god's sake. If you're complaining about the shallowness of the characters, or the never-ending cat-dog chasing between the two leads, well then you must not be familiar with melodramas. Melodramas are usually very slow paced, filled with one-dimensional characters, and everything is exaggerated. In terms of the story, I was fine with it. Nothing spectacular, but I liked the backstory and how the story progressed (especially the ending). Gave everyone proper closure (yes including Shin Joon Young), and reminded us of a sense of realness.

Acting
Kim Woo Bin literally carried this show. If you were to compare his acting to a boxing match, it's a straight up beat down. Every time I think of a bad boy stereotype, I always remember Kim Woo Bin. He just portrays it the very best for me; signature smirk, douchey tone, always looks angry. Idk... it gets the job done for me. Suzy was ok for me, like the rest of the cast. Not good, but not bad as well. (For all Suzy haters by the way, her acting has improved drastically in while you were sleeping)

OST
This is the bomb!!!! I have only given a perfect 10 to music to 1 other show, and that's Goblin. Trust me, even if you don't know the show, you'll love the OST. It fits the scenes in the show perfectly, and the blending of the music made it so much better for us to hear. Even the english song was good. The tune and melody are happy and bubbly and full of energy, but when you actually listen to the words, it's actually bitter-sweet cause it kinda foreshadows a lot about the show. I loved every song in the show.

Rewatch value
I'm not really a fan of Melodramas, but even if I was, I'd still not rate the rewatch value of this enough. The heartbreak was good, but it lacked enough 'romance' and proper build up for me to remember.

Overall
This drama received so much hate and criticism because of it performing badly, and people started to say that it is a bad drama when it's actually decent. Let's be honest, how can you expect this drama to be viewed a lot when it competed with Doctors (Park Shin Hye and Kim Rae Won) and later on, W (Lee Jong Suk and Han Hyo Joo). That's just plain injustice