This is an indispensable, huge Asian grocery store right in the International District with pretty much everything you could possibly want. As a plus, it's in the same building as a very good bookstore (Kinokuniya) as well as a food court with lots of good little restaurants.
My only complaint is that it's a little on the expensive side, almost as expensive as an American grocery store. There are other Asian grocery stores in the Puget Sound area (such as Paldo World and H-Mart) that are much cheaper.
Pros: great selection
Cons: kind of pricy