I can only recommend the stay with CJ. I stayed for one week. It was quiet, clean and it has some small facilities to cook. It has a very nice atmosphere. The communication was very good as well.
The place is very close to the central station, only 10 min walk:).
PS! The only thing: for people who have difficulties going up long stairs, this wont be for you. (for elderly people, or generally people with walking disabilities)
Thank you so much, I will come again!!!