We went there with a group of 20, and they were very insistent on us bringing cash to ensure that it would be less time consuming when it comes to paying them. Sure, we all went in with $20 cash. After we ordered, we waited for more than half an hour for our actual food. So I wouldn't suggest you coming in during lunch time. The waiters were very impatient with our group, telling us that other people were waiting for their food as well. The side dishes didn't come until several minutes before our main course, so that was disappointing.
The food there wasn't spectacular. I have had food that was better, but for the price it offers and the location it is in, it's definitely one of the most convenient places to go to when you have a Korean food craving.
Definitely try out their Kimchi jiggae though. It didn't have a lot of meat in it, but the flavouring was awesome!!!