i stayed at (inn-the city COEX). it was great, very clean, modern, comfortable, the staff spoke English good enough, and they were very helpful. it's 2 blocks away from yeoksam station, and about 10 min cab ride from yeson 7000 won. i highly recommend it. it goes for like $80/night depending on the suite you choose, & all suites have a kitchenette. i flew Delta from Toronto, with a layover in Detroit. the flights were on time, and the service was great, overall a great experience.