For an unkown reason this drama received a lot of criticism. The story line was really good it comfortably took care of every aspect of falling in love with personalities of the same person. Hyun Bin was amazing in portraying both roles. Agreed they dragged it a bit but even then this was a well planned out drama and definitely needs to be watched. It's unfortunate it released along with kill me heal me. While i like that too i think it took on too many personalities and had too less time to deal with them properly. While that feels nice but leaves you confused by the end of it. This leaves a good feeling while making us sad. It leaves behind a satisfied feeling. On the whole this deserves a watch.