We loved our stay at the SEACLOUD. Our view was absolutely amazing, and it was so nice to be able to lay in our bed and stare at the ocean from our wall of windows. The room was huge and a great size for our family of four. The room does get quite hot because of all the windows, but the aircon worked well and we would close the blinds when we went out.
At night, you could hear a bit of noise (music and people) from the street, but not enough to be a problem, especially from the 21st floor.
I would definitely stay there again, due to the views, and the size and cost for a family of four. It was ideal for the end of our trip to Korea.