Most importantly, the room was clean. Indoor slippers were provided as well.
The place is a little ways from the station, so be prepared to walk around 10 minutes to the nearest subway station.
Checkin was relatively straightforward- you can use a kiosk to check in/out yourself, and many languages (English, Chinese, Korean, Japanese) are supported. There is also a multi-language currency conversion machine available in the lobby. Staff are okay and available at the front desk.
My room included beds, a desk, and a small couch.
There is a washer and dryer provided on several of the floors, which is very convenient. However, the machines are in Korean, which can be difficult to read and operate.
A decent stay for its price.