I stayed at Ambassador with a friend for Ladies shopping weekend in Seoul. The hotel was very good for that purpose!! They offer shuttle service to 3 shopping locations, the underground station is also close with direct line to the palace museums. The area of hotel is quiet residential/university area, but there were a few restaurants nearby the station.
The service at the hotel was very good - we had requested a wrong type of room, but were given the room we wanted for 2 nights, when it was time to shift on the last night, front desk made all the arrangements, including bringing the new keys to the room and shifting the luggage.
The room is small'ish, but it was better functioning and equipped than the room at Ritz Carlton earlier. Rooms have nespresso machine with complementary coffee. Very nice touch. Small b'fast at lobby cafe was useful as well.