During the whole process of the 2 months this show aired, i could not concentrate on anything other than this drama.(made me crazy loool ) Usually i watch multiple dramas at the same type but this drama made me discontinue other dramas which i was watching at the same type bcuz they just werent as good as this one. The story, the cast, the acting, the music, the cinematography was perfect !!! I watched the Chinese version (bu bu jing xing)before and i really liked it at that time but this korean version left me speechles. Although the ending could be improved a little bit (by adding the (30sec-1min) scene wich was cut)but it didnt annoy me at all. The main male lead( Lee joon gi)'s acting was superb with his mili-second expressions. Also at first half of the series the pacing is not that fast however in the second half it gets a bit rushed. However, overall this drama is really brilliant/Phenomenal even with its minor faults here and there, which could have been improved by the director. But this is the first Drama that made me go to the soompi forum, first drama that i was obsessed for a long time even after it has finished. (me speaking this bcuz im hardcore Korean drama fan since 2005, and i watched a looooooooooot of drama/ possibly every poplular kdrama up to this date). The only fantasy element in here is timetravelling but apart from that it is quite realistic for K-drama and the ending wasnt as forced /typical/ cliche ending u would usually see in kdramas. I highly recommend this drama!!! However watch only the SBS version which is much better than the international version.