Out of all places downtown, this one happens to be one of those Asian restaurants that only accept cash unless your order is over $25. Maybe they assume that all of the tourists coming out of the Greyhound station across the street carry cash or something.
Food is pretty typical for a Korean restaurant although you can find much better ones in K-town. I've tried a couple of their bibimbaps which are decent. I wish they had offered purple rice instead. Their side dishes are pretty good, especially that fish cake, and they are refillable! Service is okay for a restaurant of this size but some of the waiters had a hard time describing the food items in English. That being said, they are pretty friendly and they kept coming back to refill our drinks.