Personally, I felt this drama started well, as it portrayed the ways in which a person's self esteem can be destroyed; verbal abuse is mental cruelty.
What I loved: the cast were all excellent and I so enjoyed Shin Sung Rok's portrayal of the churlish, phobia and allergy ridden lead male! He played it really well and shone at the times when he was acting shy, awkward and at odds with himself. He comes across as younger than his actual years.
The message I took from this drama was a positive one; that one doesn't need to be slim or beautiful to be loved. Self belief, self respect, self love all need to come first, as this provides self confidence. It's also how we make others feel about themselves that can affect their feelings toward us.
There was comedy and sadness, with some touching moments.
What I didn't like: the story became too drawn out and I felt like the writer lost their direction. Too many scenes were repeated and some scenarios were ridiculous, even for a fantasy.
Whilst a lot of it was good, the music was all over the place and veered too quickly from moment to moment. (One song that stood out for me though, was Queen's 'Lily of the Valley', a 1974 B-side single that I never expected to hear in a K-drama!)
I loved watching Sung Rok, but this isn't a drama I'd revisit.