Clean, convenient to airport, safe, loads of walkable options. Yet, these are all typical for Korea.
The issue here at this hotel is the notion of "global". Noted that this is not a Four Seasons, but if you are to advertise yourself as a convenient, global hotel for travelers, a number of areas would need to be upgraded: unclear check-in instructions, no 24-hour staffed desk, insufficient English signage throughout property. Again, I need not take this assessment if I were staying at a "local" hotel (of which there are dozens within 200m of this property), but if you want to advertise yourself on Expedia as "global", there are mandatory improvements, most of all with check-in procedures.