good points?
lee joon's acting
do yun's pretty face c:
seeing hwal's hairstyle change over the years
ost, gosh I love 4men's voices
seeing a family form

bad points?
...quite a lot, gosh I really wanted to love this one
the repetitiveness and I mean this in all aspects you can think of
that damn light they shine everytime hwal and sang un are in the same frame. this is, funnily, my most hated aspect lol
the 2d characters
...the romance :/

honestly the drama started a bit strong but it went downhill maybe from episode 6 or so. as with so many other dramas, it was unnecessarily stretched. 10 episodes would've done it more justice but it is what it is.