spend 5 nights in the Hongdae Guest House. The place is really clean and cozy and the Guest House owners are too kind. I loved the time I spend there and for sure I will stay there again when I visit Korea one more time. Mr. Chul Kil and his wife made more than enough to provide me a nice stay, one day we even had a traditional dinner together! The place is really near 2 subway stations, what makes really convenient to travel around Seoul. You also get a key for your private room, in case you want to have more private or avoid others to enter in your room. The guest house stay in a silence neighborhood and you won't have problems with noises at night, including from the highway. Also there is a convenience store with only few steps of distance from the guest house.