Wonderful show. I spent most of my time thinking how attractive both of the leads were. They were both stunning. I actually liked both of the characters. There was quite a bit of physical humor, which was fun, and his facial expressions were priceless! Yoon Kyun Sang played this part perfectly. He was harsh at the beginning, but he did an excellent job of displaying his vulnerability. When he smiled a partial smile for the first time, what a treat! They did a good job of portraying the OCD. I loved her friendships with the rest of the cleaning crew. Didn't like her dad, HATED his grandfather, and I felt the ending was entirely too rushed after spending all that time trying to get them together. Korean shows use that "going away for years" storyline a lot, I guess. Funny, sweet, romantic, low angst, happy, though rushed, ending.