The Westin Chosun, along with the Radisson Plaza and the Lotte, are the most centrally located hotels in Seoul, right across from City Hall.
I prefer the rooms at the Hilton (a bit less conveniently located but still central), but the executive lounge at the Westin has a better spread.
Small bothersome details at the Westin Chosun:
- their better rooms are not usually not offered for shorter stays (less than 5-7 days)
- no blackout curtains
- expensive, one is paying for the location (the Ritz and Shilla, for instance, offer more for less $, but are a long way from the city center). At least this seems to keep away some of the less polished guests who invade the Hilton on weekends.
A good hotel all in all. A convenient location is certainly important in Seoul.