I really liked Rain. I watched some of his videos on his youtube channel and what you see is what you get. He is funny, easy-going, knows how to hold a conversation. That being said, my problem was Ro Hong-chul and the dynamic between the two. I don't know if this is how he is all the time or he felt pressured to be over the top, loud and it got really annoying. I felt like he was trying to be "funny" every minute to offset Rain but Rain is funny enough on its own. The constant Netflix merch he would wear/show and shouting "Neflix" was at first funny but then got really annoying fast. By the forth episode I was already cringing every moment he obsessed about Netflix. The whole show felt like Rain is the main character and Ro Hong-chul is just a guest following him around, trying to be entertaining.
All that being said, I still really liked it. It doesn't showcase korean culture, history but focuses mainly on food and what it would be like going on a road trip with a friend. Fun, some sightseeing and lots of food.
Another positive thing is the soundtrack, Lee Sang-soon really did a great job.