Just stayed one night, but would definitely try another hotel next time.
Be aware check-in is strictly 3pm (checkout 11am), otherwise expect to get hit up to pay an extra 20k KRW or more! I tried to check in around 1:30pm (which in most cases hotels would try to kindly accommodate) but was just told abruptly that check-in is 3pm without being even offered and unaware of the somewhat late check-in. I had to call the lady back (seemed to be a supervisor) and ask if there was a room available, to which the lady exasperatedly checked and told yes - but I need to pay.
Returning later in the day - as I refused to oblige such unfriendly behaviour, another member of staff more kindly checked me in - just there were comparably more questions than other hotels for some reason (collecting marketing data I assume).
Cleanliness of the room seemed OK initially but then I found some hairs in the shower area and that the toilet seat was dirty which really shouldn't happen.
Despite WiFi signal being good internet access was slow and unreliable, so I was glad I didn't need to work too much that evening.
The entrance was also confusing the first time and I saw multiple other people struggling with escalators not working and confusing or missing directions even when they got to elevators.
Overall the service and cleanliness didn't come close to meeting my expectations for a 4* hotel so won't be returning and will rather stay somewhere else more welcoming. There are many options nearby.
Vertalen