Story- It was a little confusing in the beginning, but it explained things quickly. In some ways it reminded me a little of Glee with musical theme. I thought the execution of the plot was done well. Casting- I loved all of the cast members. I also had a huge crush on CN Blue's drummer by the end. His character is just adorable. I don't think any of them really hindered the development of the plot. Music- The music was very good. I considered buying the soundtrack after I finished it, but I didn't. If the music had sucked in this drama, the drama would have failed since that's the main focus. Rewatch- I might eventually rewatch this, but not right now. There are just too many dramas I haven't watched yet. :) Overall I thought this was a good music related drama.