We went to this hotel because it is reviewed in a French guide book (under the name Cheon Il Eun Chon hotel) as having thermal water and a person in our group of 3 wanted to try it out. This might be the case (who knows if the water coming out of the taps is thermal hot spring water or normal ?) but you would need to be desperate to go here.
The hotel was probably built in the 1970s and doesn't look like it has been renovated since. In the room there were stains everywhere - on the floor, the side of the mattress and on the walls.
We were there in mid-October when nighttime temperatures in Busan are between 10-15°C and day time temperatures are around 20°C, however it was very overheated even at that time of year. Unfortunately we couldn't open the window to cool down as there was too much street noise outside. Admittedly there was a fan (ventilator) but it was right over our heads.
We went out during the evening and when we came back we noticed that there were business-card sized flyers of naked women advertising their services propped up on the steps leading to the hotel.
This hotel was very over-priced for what it was and you could find a much better quality for the same price, or even cheaper.