If you like Park Bo Gum and Kim Yoo Jung watch it. If you are not that into them you may don't like this drama.

It's a saeguk where everything is too naive. I felt like everything was a bit "poor". The story was ok, the acting was ok.
If you want to watch a saeguk there are a lot of better choices. If you want to watch something similar but better you can just watch Rookie Historian Goo Hae Ryung.

If you still want to give this one a try you probably won't regret it. As I said, it's ok. Not great, just okay.

PD: Remarcable acting from Kwak Dong Yeon