I had as short stay here on layover at ICN. Arriving after midnight the shuttle bus was not an option, a taxi at this time was about 8700 KRW and was a quick trip, arriving in less than 10 minutes. On the return I took the complimentary bus which left promptly.
I was upgraded to a Deluxe Double Mountain View room. It had a nice integrated seating area with a bed facing out to the small balcony. The bathroom had large spa tub including a large vat of bath salts which was a nice touch I though. The room also had some nice extras like a Bluetooth speaker.
Overall this was a fine place for layover and Id be happy to stay again.