How do I start this review? I've seen so many mixed comments, it's not even funny. Personally, I really enjoyed this drama. There were a few scenes I could have done without but I think they did a good job considering the other 12 episode musical drama I watched made me shake my damn head so many times at the ending. Like that ending didn't make sense to me. This one though, I think the way they tied up the loose ends in the story was enough for me. I think I know why some people thought it was a waste of time. i think it's a matter of preference. Some were expecting something, while I was sort of had an inkling of how it was going to end. (It's so hard to write a review without spoilers >_<) The story: It is not the best written story in k-drama land, but I think they were able to live up to their title. The story is about perseverance, about not giving up no matter how many times you fail. There were a few scenes that I could've done without but it gave me enough emotions that I liked too. The bromance, the relationships, family, I liked them. The acting/cast: I am not a big fan of Min HyoRin who plays the main protagonist, Gu HaeRa. She wouldn't be my first pick for the role. She was a bit lacking, in my opinion. But the 2 main guys though, Kwak ShiYang who plays Kang SeJong & Jung JinYoung who plays Kang SeChan/Ray, were pretty good at their roles. SeJong singing...I fell for him right away. I really liked their scenes. I love the other members of the Perseverance team. Lau Henry, who plays Henry, his awkwardness and sometimes tactless moments were too funny. Yoo Seung Eun, who plays Lee WooRi, her voice is just great. And ParK Kwang Seon did a great job at playing his character too. The music: I love, love love the music. If you don't like the story, just watch it for the performances. I just love all the songs. Yoo Seung Eun's cover of Jasmine Flower, Perseverance Team's cover of Sixth Sense, Yoo Seung Eun's "I Love You" and more. Re-watch value: Would I watch it again? I think so. I really love the performances and the story wasn't bad. Overall: 9.5 It''s not perfect but it's not bad and I enjoyed it.