I went there for lunch on a Tuesday. Not that busy around 1:00pm. They have a decent lunch menu for $5.99 which includes miso soup and green salad. The miso was a bit watery and the green salad was cut up lettuce and dressing.
I order the bento box with chicken (or beef) and it was a decent size. It was sliced chicken instead of the usual slab. The bento came with rice, veg tempura and 3 pieces of salmon maki. I was actually full.
I'd come back to try the all you can eat korean BBQ next time. For $9, it seems like a great deal - chicken, beef, fish and squid with lots of side dishes.