Every time I come to Sura, it's always pretty quiet. WIth a maybe 3 or 4 other tables (including myself), service was decent. They gave you drinks, the food, and then cleaned up when you're finished.
I had the Gamja tang and liked it! Although there was a lot of salt and pepper, it was still really good for the price. It's a really nice Korean restaurant in the NW, therefore I would definitely come back!