I'm currently watching this because I wanted to lighten the mood as I watch Save Me. I chose this genre because I really love Go Back Couple, and Familiar Wife is listed in the recommendations. I think I set a high expectation on Familiar Wife because of the warm feeling GBC gave me. I'm really into family dramas that promote strengthening of family ties. Of course I will always root for Seo Woo Jin as she is the original wife, however I feel uncomfortable in Joo Hyuk's second life. Technically, in his second life, it is Hye Won he must be loyal to. The travelling back in time made everything different. I have nothing against Joo Hyuk, actually I like it when his character develops and realizes his mistakes, but I do not like the situation he is in the second life. The story makes Woo Jin a mistress, in that sense. Some might say that even Hye Won seems to be adulterous because she is falling for the college guy, however, we didn't have a clear background of who Hye Won is in Joo Hyuk's first life.
But let's see, I'm still at episode 7. I'm soo confused right now, like I feel it's not right.
I'll be back editing this if things go smoothly and will give me a major turn of events.

Update 1: I finished until episode 8. I must say, the difference between GBC and Familiar Wife is the time capsule element. In GBC, the main goal is to revisit and rekindle the memories that bonded the couple, that is why both Husband and Wife returned in time with their memories. It aimed to let the couple realize where and when did things go wrong and fix it from there. By the half of GBC, you could sense that the time travelling miracle happened in order for the wife and the husband to get back on their life as a couple.
In Familiar Wife, it is only the husband who retained the memories, while giving the wife little hints to have the familiar feeling towards her husband. By episode 8, I could sense that it is the wife who really loved the husband. The reason maybe that only the husband has his old memories is to teach the husband the importance of his wife. As I observed, never did the 1st wife mention to her husband about divorce, meaning the wife still believes in their marriage. Therefore, the back in time miracle is really for the husband. Sadly, it seems hard for the husband to go back in time again and make everything as it is in the original.