The hotel is well located at less than 10 minutes to the Yeouido metro station which gives you access to everything. The rooms are fantastic. I was just missing some shower products close to the bathtub like you have within the shower. Taking a bath, seeing the city lights was a great experience. Also the sport area is fantastic (squash, golf, pool, fitness...).
The food at the hotel is a bit expensive if you compare to the food prices in Seoul, but the quality is super nice so the price makes sense.
Best thing was the apartment space... It's incredible.