I went in with low expectations and mainly watched for the cast. If you're watching for the same reason and generally like this genre, then you will probably find it decent. I'm not saying it's amazing, but for the most part it was enjoyable. Seeing the main character level up is pretty satisfying. After completing this drama, I see why people were disappointed. It didn't help that they had high expectations to begin with either. This drama had a pretty decent cast, ost, and production (considering it was filmed many years before it actually aired). The story is pretty good, but the writing is kind of weak. The beginning was really confusing. The writing assumes you've read the novel or synopsis and know most of the backstory. After a while, you finally begin to understand and enjoy the story though. Many people also found the pacing to be off, but it was not a problem for me.

The problem mainly occurs with the ending. When it comes down to it, this is essentially a revenge story. However, when it comes to the highly anticipated revenge, it was just not satisfying. The moral or point of the story seemed to be lost. Also, apparently the drama ending is different from the novel ending, so novel fans must've been extremely disappointed. Clearly, there was a lot of stuff that got cut out. Was it budget cuts? Censorship? Who knows? There were also a lot of missed opportunities. I could see they tried to touch on some things (such as parallels between crown prince and "that person"), but unfortunately they did not have the time to explore further and failed to hit the point home. If you're considering giving this drama a try, maybe watch while skipping the last two episodes? That way you can enjoy the drama without being disappointed.