I really liked this drama. I started watching around valentine's day, which was perfect timing, and marathon-ed through it pretty quickly. What I liked most was the romance, which was bittersweet without being depressingly tragic. What I wasn't sold on was the corporate drama, which just wasn't that interesting to me, but is given a lot of focus. There's also some suspense, which was handled well. The whole concept is interesting, but it isn't very original, even in it's execution (audible heartbeats are becoming a Kdrama staple). This is one of those dramas that delivered exactly what I expected, which makes it pretty predictable, but still fun to watch. The cast was great. Kim So Yeon is great as the by the book Sun Jeong. She was the polar opposite of her role in Prosecutor Princess, which I hated her in,so that was already a plus for me. Jung Kyung Ho, as the revenge driven Min Ho, was also great. Although their chemistry is a little more reserved, I loved watching their developing romance, and they did have great chemistry. I thought Yoon Hyun Min was good too, and made for a great love triangle initially, but eventually his character became such a cliché that it was hard to take him too seriously. This is also one of these dramas where the supporting characters really stand out. Jo Eun Ji (my favorite Kdrama bff), Lee Shi Eon, and Ahn Suk Hwan were just as engaging as the leads to me. Their relationships to the main characters were some of my favorite moments in the show, and Ahn Suk Hwan was the only actor who actually made me tear up. I also liked the mysterious Han Ji Hyun, for her subtly sinister addition to the cast of characters. Would I watch this drama again? Possible, but not likely. There are far too many frustrating moments, so I would probably just skip to the parts I liked. Also, knowing for sure what will happen next, makes the predictable parts even harder to sit through. The last episode was satisfying, but a bit melodramatic. I also think it was the perfect length, not too long or short, and no moments that the story dragged (I watched the entire show in a few days). Overall, I would recommend this drama for romance fans, though not as enthusiastically as I would recommend others. The humor and suspense also makes it good for those viewers who don't want to strictly watch a love story. I would call this a light romantic melodrama, and a good show to watch if you want a break from more intense shows, without going for straight fluff. That's exactly why I watched, and I'm glad I did.