I read somewhere that the scriptwriters said that when this came together, it was like it had 'come from god'. I can see why, because it is utterly magic. And somehow they magically got lead actors who were also utterly magic. I found it lovable and heartbreaking and unforgettable. Technically it's incredibly well put-together - the cast in general, the music, the cinematography, the amazing job they did with keeping the complicated timelines straight - but it's the emotional impact that puts it into top-grade for me. I would never have expected a time-travel drama to feel this real, especially when portraying grief, which is very easy to do badly. YES, you should watch it.