The apartment has a full kitchen, laundry machine, microwave, rice cooker, oven, a big refrigerator. It is just next to the luxury Daewoo Hotel but with only half price per night. Materials for cooking could be purchased at Lotte supermarket (opens 09:30-10:00PM daily), which is located across the street at the basement of the very modern Lotte Department Store. Staff is English speaking and kindly to help. Individual WiFi router in individual apartments.
Not all of the facilities were placed in the room in the first place (ie, hair dryer, dish detergent, dish washing sponge), you may have to ask the front desk to provide them.