self check -in&-out.
Before i arrived the NJoy guesthouse, i got an email about how to "self check-in". Room was clean and everything was prepared. I did not see any employees even when i left the guesthouse.
Pros: Convenient and everything is self-done
Cons: verbal instruction from guesthouse at least when i arrive?
Location: guesthouse is 10min walking distance from seoul-station and there is a direction train from incheon airport to seoul-station.