The show was so well acted with a lovely and almost too-realistic storyline. A lot of parts hurt to watch and I shed many tears throughout the 42 episodes.
I will say that if you're looking for something super fluffy, cute, lots of romantic elements, etc. This show is not for you. The romance is almost non existent and is more of a slice of life of 30-something year old characters growing as they navigate through what life throws at them.
Normally, this type of drama isn't my cup of tea for the exact reason above. I tend to, well, like a little more romance in my romance, but for some reason I couldn't look away from this drama. It was well done. I likely will never watch it again, but I do not regret the time I spent watching this one even a little bit. Indeed, I am glad I gave it a chance. :)
Another SN: Don't expect a "romantic" ending either. It is much more realistic than that.