The drama started out well and if it would have ended on 2/3 of its length - it would have been such a better watch. The story had way too many tropes for sub-plots which it could have easily done without.
The good things were:
FL acted really well and had a great comic timing. She and the kid were the only characters who made the last 1/3 a little bearable.
ML is cute and definitely a treat to look at, but FL stole the show for sure.
The female friendship was a treat to watch. I kept expecting someone to backstab/plot and I was pleasantly surprised.

My issues with the drama:
I have a short attention span and the drama has to be really good to hold my attention. The last 10 episodes I had to see while fast forwarding. There was too much going on, a lot of open ends to be closed and there were some very unnecessary revenges, trauma and redemptions happening. I personally don't think that arc was required. All this unnecessary chaos took time away from showing growth of the characters. Second lead essentially woke up one day to realize he didn't treat the second FL right and got her back after minimal pursuing. There is also a 6 year leap which essentially solved all problems on its own without portraying any actual growth.

My recommendation
It's a decent watch with some fast forwading involved. However, it is definitely not rewatch worthy.