This drama is the perfect example of "You don't know what you have until it's gone" and "The grass isn't always greener on the other side"

Plot

Everyone is pointing out the similarities between Go Back Couple and this one. And yes,in the beginning they're definitely similar but to be honest,Familiar wife can't be compared to GBC. That drama was worth a perfect 10 and this wasn't (it's just my honest opinion)
So the plot isn't really unique and it has some flaws,it got boring from time to time and i wish it was shorter. They should've ended it around episode 13. I think they dragged the story too much (episodes 13,14 & 15 were just fillers) to the point i wanted to start a whole new drama and watch this one later. The writers also left a couple of questions unanswered.
But overall it's not like i didn't enjoy it,i actually did. I liked that it highlighted well the fact that most marriages and relationships aren't perfect and that you should learn to communicate better and have a good teamwork to make it work and not fall apart. Also, the ending was perfect. I'm glad i could see how all the characters lived before, during and after the changes.

Acting

The acting is a 10. The cast did a wonderful job and Ji Sung never disappoints.
Some of the characters are gonna get on your nerves. A LOT. But this drama has such an amazing character development. You can see it through all of the episodes. And it's really satisfactory.

So,it's not a drama that i will be remembering forever. It failed in making me feel excited until the end. And as a drama binger,i don't really recommend watching this all at once. (If you're like me and get bored easily...) But i do recommend it if you like time travelling dramas and amazing acting.