I actually didn't start watching this until it had finished airing. I didn't know what to expect, just simply knew it was popular. When I started watching, I was hooked as soon as I found out that the lead female was blind, and what interesting love story could unfold with this. Really just a magnificent drama from beginning to end. Some people seem to have problems with the end. Seems some don't understand it, and I'm not sure why they don't, it's pretty straight forward. There are usually tons of things that end up bugging me in dramas, but there was only one here and it came in the last episode. It's the decision Kim Bum's character makes in the end. It felt like a last minute tacked on thing just to give the drama it's last OMG moment. But even still with that, everything turns out fine in the end, so it's minor and it certainly didn't ruin it for me. Some people may think the ending was interpretable, but I don't think so at all. Acting was absolutely fantastic. I was blown away by Song Hye Kyo's acting, she was so great. Zo In Sung too. OST is also fantastic. Only 5 songs though, but can't stop listening to Winter Love by The One, such a powerful song. All in all, a great drama. Great beginning, and great ending. Completed about 50 Kdramas now, and this one definitely enters my top 3.