The Good:
⌲ Park Shin Hye's smiles (especially compared to her younger self)
⌲ There is some decent comedy here and there.
⌲ There are no triangles.
⌲ The drama mostly delivers in the complication-free fluff genre. (and I'm all for these)
⌲ Yoon Park in a kind role (I've only seen him in really annoying villainous, or grey roles before)

The Average:
⌲ The breakup (As far as noble reason breakups go this one is not bad. )
⌲ The chemistry between the leads was whelming.
⌲ The villain (messy pointless plots, but at least a relatively tame villain character)
⌲ The medical stuff is very poorly researched. (luckily there is not that much focus on this)
⌲ Hong Ran

The Bad:
⌲ Park Hyung Sik has matured too much to pull off the aegyo and a childish adult character in general. (not that we need aegyo in our lives lol)
⌲ The team should have used child actors in the high school flashbacks, every scene looked jarring like this..
⌲ The final episode was very boring, filled with some ridiculous product placements & very few swoony scenes (car, hug the couch, buy the bag)
⌲ What was the point of ML's parents being in the drama???
⌲ The drama is somewhat poorly written without much planning involved.
⌲ Adding to the previous point Nam Ha Neul is basically a completely different person later on, where did her spunk go?