Although 20 episodes are too much, some episodes are just fillers. I still think is pretty darn good.

I am a big fan of hospital dramas, I really loved how they filmed/edited the surgery scenes it still looks realistic without showing the actual cutting of the skin. Some people cant even withstand watching blood even from prostetics.

D-Day also made me cry many times. Some heartbreaking scenes really hurts.

Also, the real reason I watched this is because of Ha Seok Jin, I did not expect to fall in love with Kim Young Kwang, I will be watching his dramas starting today.

The earthquake scene brought back so many memories from me. This series will have a special place in my heart.
I totally recommend watching this! Its worth your time!