This is hands down the best drama I've ever watched. I didn't know most of the actors before watching and was interested in the plot because it was a military romance (which is my favorite genre). I think from now on, I'll be watching a lot of Hyun Bin's dramas because — his smile ?
Acting-wise, the show was perfect. The main leads have perfect chemistry, the best that I've ever seen onscreen. I also felt like the romance was perfect: it wasn't pushed on the characters, there really seemed to be some character development and the relationship is pure love (makes you dream)
As a musician, I fing OSTs very important and CLOY didn't disappoint me one bit. I loved Jeong Hyeok's piano piece so much i'm learning it now.
The visuals were just AMAZING. The screen atmosphere kept changing between North and South and the scenery in Switzerland was breathtaking.
Finally, the storyline... This drama has the perfect amount of romance, action and comedy. Together, this gives you THE best drama of the year. The intrigue was tight, all the characters had depth and there were no plotholes whatsoever. I feel like this kind of drama is fairly rare and I cherished every second I spent watching it. To be honest, I'll probably rewatch it to cry my eyes out all over again...
Conclusion: watch CLOY because you will NEVER regret it!