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.