I actually really enjoyed this show, despite a rocky first few episodes that almost turned me off of watching. Thankfully the tone and pacing evened out rather quickly, and I became rather attached to the characters.
I loved Hyeri's character, she was smart, feisty, and brave. Seung Ho's character was pretty unlikeable at first, which was different from his other characters that I have seen and who have all been very likeable from the start. However, his character develops along the way and I grew to really like the awkward, stuffy Nam Young. The side characters were quite fun as well, and I thought Choi Won Young was particularly great as the villain; nuanced and flawed, he never over acted and was human at his core.
My only real gripe with the show is that the comedy was all over the place and sometimes poorly timed. It often stuck out at the wrong moment, or was placed back to back with a serious scene that took me as a viewer out of the experience.
However, I do think this was a good watch, with a really great ending that tied everything up without rushing or dragging out the conclusions of the characters. I would recommend giving it a try!