A Korean Odyssey is a twisted rewritten story from it's origin story about Sun Wo Gong (The Monkey King). Growing up with the original Chinese story, this Korean so called adaption is really far from the original story. It twisted the original story about the journey of Sun Wo Gong with Priest Tang San Zang and other disciplines to find the sutras into a merely love story between Wu Gong and Sam Jang.
I admire the creativity of the writer to twisted the story so much until lost the original meaning of the story, but on the same time it also make it lost the meaning of the story. TBH, if only want to write a love story, no need to take big name / character from ancient history.

On the original story the so called Sam Jang in Korean Odyssey is supposed to be a monk / priest, whom all evils / demons want to eat, as his meat can make them have eternal life. Well overall this drama still watchable, quite boring from episode 1-5, but picking up after with some funny scenes. And the thing that make me can continue watch this is the great acting from almost all of the casts!

My first impression: The story setting is similar with Cronicles of Narnia / Alice in Wonderland, when Sam Jang was a kid releasing Wu Gong.
Afterwards is just a RomCom Drama with some mystic factors. The most hilarious part to me was when the East Dragon prince sold in the fish market! And that Jonathan reminds me of Severus Snape on Harry Potter.
The ending is not really satisfying, maybe they wanted to have a 2nd season?
Conclusion: If you are not into the original Journey to the West story and watch this, I think you will find this drama entertaining. For those have watched the original Chinese story and not fans of any of the actors /actress, then maybe this drama will not be so satisfying.