I gave 6.5 for the message that the drama wants convey. We don't need to be rich or successful to be value human beings. We all are special for who we are. Nobody is better than others. In the end this message is really strong and my rating is improved because of that.
For the rest I enjoyed the first 4 episodes. They was funny and light but from the episode 5 I didn't enjoy the serie anymore. I think that the problem is the writing. A funny kdrama became sad and I love emotional scene but in this they appeared forced to me.
For the acting I want to mention Yoon Shi Yoon that like always is a talented actor.