This is one of those places, that if you dont look to your right, you'll pass it. Make sure you look for places like this in Budapest though, cuz this was by far the best foodplace we visited.
It was like a ruinbar, but with foods. They had everything you could want in the karavans, langos, burgers, Mexican, Thai, pancaces and ofcourse hungarian food. Its really hard to decide what you want, when there's so much yummie food to choose from but we ended up with two different thai foods and two mexican. Pick your food, pick your drinks and then pick a table.
And the cost is next to nothing. If I remember correctly, we payed like 4€ for each dish.