This was a tour that I would highly recommend to anyone. I had the fortune of being the only person that booked this tour for the day that I went so I had a private tour with my tour guide Ben. Ben was fantastic! He taught me so many things about Korean culture and history through this tour which made all of the sights so much better. For example, I had visited Gyeongbokgung before this tour and loved seeing the palace and its beauty, but visiting it again with Ben was even better because he taught me a lot of little details about the palace that I would never have learned on my own. This goes for all of the other places in the tour as well.
I chose the full-day option so my tour included an observatory where you can look out over the area around City Hall, Namdaemun Market, the area around Namsan Tower, Myeongdong, Gyeongbokgung, Bukchon Hanok Village, Jogyesa Temple, and then the Nanta cooking show. The full day option was definitely worth it because the places I visited after the morning only tour ended were some of my favorites. Ben took me to an area of Bukchon Hanok Village that was away from the more popular areas of the village, but it was amazing because you can look out over the city and see all the beautiful rooftops. The Nanta cooking show was very good and entertaining and I am glad I got to see it. You don't even need to know a word of Korean to enjoy it because they only say a very, very small amount of words and the context is very clear what they're saying.
I highly recommend this tour to anyone! It was a lot of walking, but I enjoyed that aspect more because you get to see the city in person rather than being underground in the subway or quickly flying by everything in a bus. I hope you enjoy it as much as I did!