Came here in the Winter and had a terrible experience. The restaurant is freezing because they only have one door that opens to the entire restaurant and whenever it opens a huge gust of wind would come in.
In the summer it will be a lot better, but this has got to hurt their winter business. As for the actual bingsu, everything was as expected and service was friendly. I've learned my lesson- this is a summer dessert place, not a winter one.