Pros:
- good central location, close to public transport
- close to great shopping areas and restaurants within walking distance
- great fitness center and a wonderfully Korean sauna and steam room (don't be shy there though)
- nice staff
- rooms are fairly lage and comfy
- overall much better than the Novotel hotels in Europe
Cons:
- When I booked it was one of the best values, compared to others it's well worth the money
- Hotel is a bit dated overall, rooms need updating
- Breakfast is only so-so for Asian standards
- Restaurant is below average but there are fortunately lots of good other choices close by
- Novotel Seoul
- Accor Ambassador Gangnam Seoul
- Seoul Novotel
