It was kind of frustating to show watch this show, because I could see the amazing potential it had and what the showrunners were going for, but it was still somehow lacking. It was still an interesting show to watch. However, in my honest opinion, it ultimately fell flat.
Imagine seeing your favorite pastry and it looks so beautiful and shiny and delicious, but when you go to take a bite... it's stale. That's what watching this show felt like to me. Great potential, fell flat on its face.

More into specifics:
• Despite the age difference of the lead couple, they were really interesting and hot together. I ship it. And it's always a pleasure to see my guy Ju Ji-hoon on screen ♥
• Jung Geum Ja's hair... Why? Just why? Whoever decided on that hairstyle should go to jail. Kim Hye Soo is beautiful woman, but that hairtyle does absolutely nothing for her, it was hideous. I spent most of the show whishing they would just put the wig from the first episodes back on her.