I thought the acting/casting choice was exceptional. Hyun Bin as always pulls off a cool but incredibly charming character (Much like in "Secret Garden" and "My Name is Kim Sam Soon") but I think the biggest applause should go to Son Ye Jin whose character is outwardly spoken and a "rich girl" which usually could annoy people, yet she portrayed her in such a way where we as viewers see her as honest and a go-getter and incredibly cool (have you ever seen an actress run that fast and look super cool at the same time?). Also big props should go to the supporting cast; the four squadron members (Yang Kyung Won and Yoo Su Bin had me in fits of laughter) as well as the women in the NK town; their scenes of comic relief as well as heart-warming parts are definitely what carries the story so well. Special shout out to Jeon Gook Hwan (Jung Hyuk's father) and Jang So Yeon (Myung Sook/Man Bok's wife) I think they were two supporting characters that I really really thought the actors did a great job with. From what I have read and seen online, the production did a very good job in keeping with accuracy of what life in NK is like (you can check out videos by defectors on YT!), obviously there will be parts that are heightened for dramatisation, but overall I think it was a great show. It's been a while since I've enjoyed a show so much! Going to have to look for something to fill the gap in my heart now haha. The overall isn't 10/10 only because the ending wasn't exactly what I would've gone for- but I suppose the trickiest part is ending a show well. Great show! Would recommend to everyone.