The house is located above a club with live music - you will get ear plugs on arrival but it might not help if you are very sensitive to noise. There is only one bathroom (2 toilets, 2 showers, 1 wash basin), if unlucky, you will wait your turn for ages (on the positive side, the bathroom is very clean and smells nice; also soap, shower gel, shampoo and toothpaste are provided for you, and fresh towel every day).
The guest house is located across the street from Busan train station and Busan metro station, which makes it extremely convenient for transport. The House owner is a very nice and caring person who makes sure all the time that you are comfortable and have everything that you need. The house is clean and warm, and beds are clean and comfortable (good, firm mattresses). There's always fresh toast, milk, juice and other stuffs (jam, peanut butter, eggs, tea/coffee) for breakfast; and the fridge is huge if you choose to eat your own food.