It's in Hapjeong Stn (Line 2,6). Near Hongdae stn and Airport limousine stop. You can get to Hongdae in 10minutes by walk. Many famous restaurants is in here. You can see Hangang in the room from Seogang bridge to Seongsan bridge. It's located in 28 Floor.
And It's constructed in 2016. So too clean. It set Air conditioner and Heater(Boiler), Wi-fi internet and free egg(portable wifi), Queensized bed, Queen sized matress.