Been to this place many times. I've had both the Japanese and Korean food. I usually order the sushi trays with over 50 pieces. Sometimes, I order the marinated ribs that comes with rice. Yum, very tasty.
I tried their bulgogi in a stone pot with rice, it was good but a little on the sweet side. I've also been there during lunch times. Sadly, the bulgogi in the lunch set box wasn't that great. Pretty disappointing. =( I ordered the lunch set with the Grilled Salmon, but the salmon wasn't that great. Compared to how the food tasted during my first few visits, the food quality seems to have changed.
In terms of service, pretty quick. Once in a while they do forget what you asked of them- I.e. I asked the waiter to bring me a container and he/she forgets and I have to remind them.