We stayed in the new Hanwha Resort wing. It was quite quiet when we stayed recently perhaps it cater more to Summer vacation goers. The buildings are connected and long. Breakfast at building/section 6, so if you are at the other end, can be quite a walk.There is also a big convenient store (CU). Every other facilities (spa, pool) is payable. You need a car to go there and also around the area.
I like to open my balcony door a little for some fresh air but it was noisy especially at night when it's near the fountain (main entrance to hotel). The heating facilities does not seems to work in the room. Room was big for 2. The place did not feel cosy or warm (feeling) in general, could be just a personal opinion.
Balcony comes with laundry stand, could be useful if you stay a couple of days. But probably is better to dry indoor as the air was drier in the room. My shirt stayed as wet overnight due to high humidity outdoor.
The resort is not a place to stay indoor, attractions were generally around 15-20 min drive radius. There is a water park in front of the resort which I was told only open in summer.
Breakfast gets crowded around 8am, so plan to do early at 7:30 or late at 9am if you do not want to fight with tour groups. Quality of food is good and quite a few vegetarian diet options.