This is a nice hostel conveniently located in a close proximity to Exit 7 of Hongik University Station, which is one of the stations if you take the all-stop Arex train from Incheon Airport to Seoul Station (or vice versa).
As the area near Hongik University Station is a busy and popular place among the Koreans, you will easily find a lot of nice restaurants, boutiques and cosmetic shops.
You can also find street performances and busking there. Having said that, the surrounding area of the hostel is quiet enough for me to have good sleeps for 2 nights.
Despite shared bathroom and washroom, the hostel is overall clean. The owner is very friendly and can speak good English. Please remember to bring your own toothbrush. They also provide a big enough locker for each guest in the room.