The wet area is basic, with a few different temperature tubs, cold bath, a couple sauna rooms, and a nice wooden bathtub. There's almost always a lot of children in this busy sauna (women's side anyway). Upstairs, the co-ed dry areas are pretty nice. There's a decently-sized free fitness center for use only by jjimjilbang-goers, a good Korean food restaurant, and one large central room with a TV. All of the hot or cool rooms are located just off the central area, and many of them have their own TVs, which makes them a bit loud. I would NOT recommend this place for day-time naps unless you're not bothered by noise.
Hwang-so means "bull" or "ox" in English. When I moved to Sungseo, this was the first sauna I managed to find in my new area. Thank god, because I finally discovered how great it is to get a body scrub! As usual, some of the scrubbers are better than others, but I liked this place in general.