Be prepared to wait a lil bit. We arrived around 1 pm on a Sunday and there was a line out the door, probably like 6 people ish ahead of us, waited about 5 minutes to order, and another 10 to get food, but they bring out your drinks to you while you wait so it doesn't feel like a long time at all. Very friendly cashier to order with, explained options, then you choose a seat, and they find you and give you your drinks and food later.
The cheese burgers are excellent, get grilled onions if you get a chance. They also have great horchata, nice and creamy and just the right amount of sweet. You even get free refills apparently if you stay long enough.