Ok...so it was cheap and in a good location, and those were the things that mattered most. Sinchon station is super close and that meant all of Seoul was accessible. Aside from that, the room was small, most of it was a plywood platform for the beds that was a little dingy. A lamp, coat stand/drying rack and side table were all broken, and there was mold in the caulk around the window and in the bathroom. The bathroom was a wet bath with just a sliding glass door separating it from the rest of the room, so I hope you're comfortable with your roommate. Standing room for one person only.
Additionally, I only saw somebody at reception one time. Maybe they worked there, maybe they walked in off the street. Who knows. No security (but Seoul is generally safe). Check in involved calling and picking your keys out of the check out basket. Check out involved throwing your keys in the check out basket. I did see cleaning staff a couple of times, so rooms ARE being cleaned between guests. No daily cleaning, which is fine for a guest house. I did not see bedbugs or get bites that I noticed. Walls are paper thin. Heard somebody having a "good time" all night long three rooms away. Street noise through the window. Not accessible for those with disabilities- walk up several flights only. What else can be said about it? It just depends on your travel priorities.