Not suitable for clean-freak and sound sensitivity
Some hairs can be found on the coat hanger and floor (including toilet) and dust can be found at the vents of air-conditioner and exhaust fan. Besides, you can hear the conversation after late night in the street. The most disgusting thing is that many selfish persons who dragged the heavy luggages on the steps along the stairs up/ down each stairs at the mid-night.
We received email for self check in as we arrived after 11pm. The email provided useful information for us and the self check in was very smooth. The guesthouse basically provided a place for us to stay - no cleaning/empty the bin/change towel. For breakfast, you need to make your own and clean up afterwards. The staffs were nice though and would give us clean towels when we brought the dirty ones to reception. Therefore, if you only want a place to stay in Seoul, it is alright to go. However, if you have a high standard of cleanliness, then I would not recommend you to book it.