I think like most people who watched this drama i loved that it had a realistic ending even though it was super sad, unlike some dramas where a miracle cure would just appear out of nowhere and everyone gets to live happily ever after. I do wish though we got to see a bit more of how the other characters fared after what happens at the end (you'll have to watch to know what I'm talking about), i dunno, i feel like i didn't get closure or something :), but i guess thats what make it realistic, since something like that happens to you theres no such thing as closure, just moving on...i guess they wanted to show that instead. Like i said above i loved the realistic ending, and also that when he wasn't being a jerk to her their relationship seemed really genuine and cute :) But other than that Kim Woo Bin was AMAZING in his character portrayal as always, and as you've seen in my ratings i really loved the cast, i feel like every character had a purpose to the storyline unlike some dramas where you just find yourself fast forwarding scenes that include that random character and their story. Even though i don't think i will re-watch it (don't think i can go through all that crying again), its definitely become one of my favourite dramas so far, and would highly recommend you watch it!