Well, I will talk about the feelings that I get from watching this dramas. Usually I don't watch them because of the plot.

The main story is interesting but too long. It has some things that are useless and the pace is strange. How can she fell in love in few days? How can he transform from a deity that has no feelings to someone who loves her so much? Bit like the chemistry of the couple.
The family and friends are nice. Liked how they were portrait.
But... The problem for me is the Second couple.
They have a lot of screen time and I don't get it. I found myself lots of times watching some dramas most because of the second couple. Here it's the opposite.
Both men are awful and pitiful. The first is a coward, a stupid and childish men that leaves a girl because of insecurities and treated her so bad that I can't understand why the hell is he in the drama. The second one is also so stupid. How can both guys love someone for ten years?!?! Cha says he loves her and never met her after? He lied to everyone and still lived with the coward guy. I found myself not wanting that Cha end up with her, but the alternative was even worse.
I hated that relationship. And that ruin the drama for me.
I don't have a female perspective, but I think she (who I find interesting and strong in some ways) should end up with someone else.

OST - did the job but I don't loved it

CAST - most of them did a good job. I don't follow the actors and actresses, so I don't know if they are like that or only performing.

REWATCH - no! Not with the second couple in the way.

Summing up, cute relationship of the main couple. She is cheerful with a lousy life but, after finding him she begins to be and stay happy. Good chemistry and interesting dialogs.
The second couple was awful to me. Always love triangles (don't get it) but with 2 men very boring. The story here was bad, lots of incongruent moments. Didn't like it at all...
And that doomed the drama for me.