CRBP is in a great location, you've got shopping and nightlife near Hongik university, with quick and easy access to several subway lines. Unfortunately I wouldn't recommend staying here mostly because of the staff. They are friendly enough (usually said hello and goodbye) however, when I asked a question or for help I was given an answer and the staff didn't try to find a solution when the answer was I don't know. I stay at places more than once if the staff go above and beyond. For example, if I need to print something, then it would be nice to use the printer at the hostel, and pay per page, if necessary, rather than the staff telling me to go to an internet cafe to print 2 pages.
The area that people can gather and watch tv or eat is also very, very small. The staff would sometimes sit on the couch and watch tv, and also use the kitchen table to work on their laptops. If location if all that matters when finding a place to stay while travelling, then CRBP is good for that.
Regarding the cleanliness of the room, I found a receipt under the bed from September. The linens are clean, and the area by the mirror is dusted, but they don't clean the rooms thoroughly after guests have left. There are also some finishing touches they need to work on, like providing trash bins that you can open by stepping on it, rather than using your hand.