I was having a block in terms of watching k-dramas and decided to give Healer a chance since Ji Chang Wook is one of my favorite Korean actors (and again manages to hold his place). I really enjoyed the story a lot, the amount of clichés was impressive, but not in a way that was overwhelming or made me stop watching. Honestly, I found it easy to follow episode after episode and it took less than 3 days to finish watching.
I liked the cast and felt the chemistry between the characters, although the way the romance grew between them could have been better, I felt like the only reason there was attraction was that they knew each other as kids without knowing it.
Beyond that, I found the chapters very interesting, the action scenes were good and I managed to empathize with the characters.
But I must be honest, at some point I felt that the plot lost its way and just a bunch of random things happened that without being very convincing for the viewer turned out to be convenient for the plot itself, but I must say that I didn't care much and kept watching. On the other hand, I liked the ending, but it needed more emotion or maybe it's just me, I felt that it lacked depth in how some things turned out (like her relationship with his birth mother and what happened with Kim Mun Sik).
Anyway, yes I would recommend it for those who enjoy cliché stories, action and romance and are familiar with the characteristic structure of k-dramas.