My bed was comfy (I seemed to luck out with a pillow top mattress - others in our group had rock hard mattresses), and the room was fairly clean. They did not clean around the base of the beds or under the couch, so don’t look too closely.
The bathroom is only separated from the main room by a half wall, so if you’re sharing the room with someone other than a significant other, it’s somewhat awkward. Our tub leaked water out of the base of the tub so he floor was always soaked after a shower. The shower is in a jacuzzi tub, and the shower head is really low. I think the room was designed for baths over showers, but the jets didn’t work.
The staff was friendly and responsive. There’s a free guest washing machine in the basement. The dryer costs 1,000 won per load. It’s really close to the Namyeong subway station and lots of good restaurants. The room wasn’t really up to American hotel standards, but from my experience with foreign travel, it was a pretty normal experience.