When I finished watching this film, I was reminded of what poet Lord Tennyson said about love: 'Tis better to have loved and lost than never to have loved at all.
And I agree with others who have commented here on the film that it s only if you have loved and had been loved that you fully appreciate the film.
One aspect of the film that I found most interesting was that Eun-su (Lee Yoeng-Ae) and Sang-woo (Jit-taeYue) met and fell in love because of sound but yet the acting was mostly silent. A simple gesture or a grimace here and there conveyed with clarity the powerful emotions and inner turmoil of these two main characters.
I am grateful that I saw the film. It was so refreshing and so different that it was sort of a catharsis and I actually said to myself, "I needed that" when it was over.