I'll preface my review by stating the obvious, in the hopes that no one gets hateful, this is just my personal opinion. Please take it or leave it alone, agree or disagree, but please respect the opinions of others (and I'm kind of irritated that I even have to say this).

There was a lot to like about this show:
Acting. Everyone was really good. Park Eun Bin as Mok Ha was wonderful. I think there were certain mannerisms that we saw that she displayed in Extraordinary Attorney Woo and I think are just part of her DNA, because I've seen them in other shows of hers. However, they absolutely worked here. She was charming and likeable, driven, yet devoted to those she loved. All of the other actors were excellent as well. I especially loved the younger actors, they were the standouts for me. Also, Kim Joo Heon playing a morally gray character, and both Lee Seung Joon as Ki Ho's father and Lee Yoo Joon as Mok Ha's father were surprising. We are so used to seeing them in the role of good guys, their transformations were amazing.

Music. As you'd expect, the OST was wonderful. Eun Bin's voice is sublime. I could literally listen to her all day.

My problem came in with the writing and the way the story was put together. On the surface, or maybe because of the trailers, this was an original premise, with strong possibilities of feeling all the feels. My struggle was this drama couldn't decide if it wanted to be a romance, a drama, a comedy, light or dark. For me, the extremes were too great. I wasn't expecting it to be fluffy, but the darkness was too dark for the rest of the drama, and the flipping back and forth wasn't allowing me to flow with the story. I didn't feel that there was enough of her on the island (a whole episode would have been nice) and the whole thing just seemed too implausible - she was that close to civilization all that time? Then, her reintegration was just too easy. First of all, the voice is a muscle. She would have needed to get used to using her voice again. Add to that, her early life was just trauma. So, she's traumatized as a child and then has the trauma of having been on an island by herself for 15 years, but she comes home and there appear to be no after-effects, just that she's glad to be back home and she immediately gets back on the track of wanting to meet her idol. It would have been so much better if we'd been able to see/feel her struggles with reassimilating into society -- that would have really improved the flow and made it more realistic.

I'd say, if you've actually read this far and are wondering whether to give this show a try, you should, definitely. Just because I'm one of the few outlier people that didn't fall in love with it, you may (and probably will) have a different reaction to it.