Honestly, it's hard to rate. I really really liked this in the beginning but I think it went on too long. There were just too many unbelievable illogical things that happened to the main hero that bothered me the more it went on. How do you survive so many things without some ongoing disability? It just got kind of crazy. I really did enjoy most of it and I so loved the bromance between the two main heroes. Some of the romance with the doctor was a little bit childish. And why wasn't anybody getting married? I thought that should have happened by the end. It's an uneven drama but overall I'm glad I'm watched it and would recommend it with some warning about the many plot points that didn't make sense.
I wish someone had worked a little harder to make the script make sense and be more realistic. I think it had so much more potential than it realized. But a solid watch and I definitely want to follow up on some of these actors and see other work that they've done.
I will close with a wish that more women characters are less childish with their pouting and hitting people. It's just so silly and it's in far too many k-dramas.