All in all this drama was okay to watch, but it is nothing to remember.
The general plot is nothing new, but if you enjoy that kind of drama, there is nothing wrong with it. Hard-working girl meets unaproachable male boss, discovers his hidden soft side/ past heartaches and falls in love.

The thing that vexes me most however, is the storyline that was all over the place. The writing was done very haphazardly and lacks effort. It opened up several interesting side plots and aspects which were never really dealt with or completed. They painstakingly introduce the main leads phobia and troubling past, but for what? What happens to Wang Jung Ae? What about her husband and her relationship to her boss? Similarly, what exactly is the relationship between Bo Na and her boss (the end confuses me there) and what's her future like? I feel I've ended up with more questions than answers.
Some of the personalities were quite flat and did not improve over time. This was particularly so with the female lead and the antagonistic boss. Bo Na does have a story, but nothing really comes of it. The same is true for the main lead which is unfortunate.
It can be painful to watch women in Asian Drama in general, and this drama has more of it than most. Bosses are male, dominant and and protect weak (even though professional) female assistants who spend their time cooking, being told about appropriate shoeware/makeup and babysit the department. But you know what you're in for, so that comes with the territory... At least it has a divorced male lead and (single) mothers.

The acting was okay but sometimes a bit over the top. I particularly did not like the female lead who alternates between efficient office professional and a somewhat demented teenager who acts all cutsy. I wonder what part of her personality Nam Chi Won fell in love with, the cutsy girly dimwit doesn't appear to be his taste at all. Maybe that is why I didnt feel a real connection between the main couple, it lacks chemistry and sparks.
I loved Hwang Bo Yool who really transforms over time which is portrait very well through Lee Won Keuns acting. The relationship between him and his assistant outshines the main couple.

Some things lightened the mood and made me complete the drama after all: Choi Daniel acted well enough and his scenes were worth watching. Some scenes were sweet, some ideas fun to watch (cactus, manga quotes, boss/tenant relationship,...)