I've visited the restaurant many times because I lived near the area, and overall it's okay. I would go here if I was too tired to cook for the night or if I wanted a quick Asian fix, but it's not recommended for any foodies.
The sushi is okay, nothing superb, and the Korean food is to be honest really average. I'm Korean so I know how good Korean food tastes like...and their Korean food could be much improved.
The service was alright- I've never really had a friendly waitress get my order nor did anyone go out of their way to make sure I had a good meal.
If you have the time, go to Koreatown for better Korean food.