Here's the thing - I went into this drama knowing that it was receiving a lot of criticism in regards to the script, so I decided to just shut off my brain and not think too much about the (very obvious) plot holes and the loose writing. I instead focused on the characters (and the acting performances) intead, because that is probably the highlight of this show. However, that doesn't mean that the loose writing was unnoticeable - it just meant that I wasn't as disappointed as I had lowered expectations. Story: The premise of this show is really, really good - but somewhere along the way the writer seemed to have forgotten what it is they wanted to tell and tried to do way too much. We never really learned all that much about the title character K2, and there were so many loose ends that weren't properly resolved. Not to mention - in regards to the direction, episode by episode, there wasn't a whole lot of development and value add to the overall storyline - the actors did a phenomenal job in trying to convey the tension and buildup of conflicts, but the pacing of the show never really allowed that to happen in an organic way. The action scenes were well done, but not well shot. I'm all about action scenes (especially ones starring JCW), but when they are repetitive and senseless, it starts hurting your product big-time. The romance in this was not allowed to develop well - it was essentially forced down our throats, which is a pity, because I do like the idea of the couple. I did find them cute and liked that they brought something different to each other's world - but this was another area that could have been done so much better. I would have also liked to see a little more development on what was going on with Jeha and Yoojin, because oh man did they have good chemistry. The political machinations were interesting and boring at the same time - I really only cared about what was going on from Choi Yoojin's angle, and found the plot lagging at times when it focused too much on the other shady figures who were trying to manipulate from behind the scenes. The dialogue was actually pretty fascinating, if only because the actors did such a good job delivering their lines that they may have conveyed more depth than the writer had intended. For a drama that was focused a lot on revenge in the beginning, that part just kind of fizzled out later on. In a way, I do kind of understand why, given the later developments, but it would have been nice to have a little more exploration on that subject (especially if you're going to use it as the main motivation for all the characters early on). It kind of felt like the writer forgot about certain elements and then suddenly remembered them in the last couple of episodes. Acting/Cast: The characters were honestly the saving grace of this drama - while the writing wasn't tight at all, the four main characters were given compelling personalities and background stories, and were actually fairly fleshed out (I would have liked to have seen a little more personality exploration of Jeha though - but hey, it's totally okay that we still didn't know very much about him when the show came to an end). And of course, the cast took those characters and brought them to life. It's been said pretty much everywhere - but Song Yoona was an absolute queen. Her character was complex and had so many different layers, and yet Song Yoona was able to convey each and every one of them perfectly. She was such a cruel and ruthless character, but also had a vulnerability that you couldn't help but sympathize with. The character was written very well, and Song Yoona was outstanding in her portrayal of the bitter and hardened mastermind. I also think the fact that Yoojin was such a complicated character overshadowed everybody and everything else - this isn't necessarily a bad thing, but when it becomes all about one character (or the writing seems lopsided in character development), it can detract from the overall production. Jo Sung Ha was so great as the politician who was probably just as ruthless as his wife in some respects, and they were absolutely dynamite as a power couple in politics. Ji Chang Wook did more with his character than he was given - and while I would have liked him to have been given a meatier role, he was fantastic in his action scenes and gave a little bit more life to the character of Jeha. While his scenes with Yoona were very cute (if a little out of place in an otherwise dark drama), his scenes with Song Yoona were sizzling. It felt like he and Yoona were essentially casted for their popularity/faces, and were basically marketing bait for overseas promotions. I was intrigued by Yoona's character in the beginning but she had limited scenes in the first half of the drama and was basically a constant damsel in distress in the second half. She has improved as an actress, but this role itself was limited (the character was good - development of that character's story was not) and makes me wonder if the producers were so keen on getting her just for her name alone. She and JCW were very, very pretty together, though, so there's that. Music: Basically all choral, all the time, but I actually did like the dramatic effect of the OST. Also, the songs were beautiful. Overall: The thing is, I could rewatch this just for the characters and cast alone. Too often, there may be good quality dramas where I'm not emotionally invested because I just don't care for the characters (and this is especially true in melodramas), so the fact that I liked all four of the main characters was a huge plus for me. The weakest link is the writing - which does matter a lot, of course - but at some point the characters do have a life of their own and I think it really does help supplement some of the issues with the plot.