Ate here a couple of time already. Now let me make this clear, this is a burger joint using…read moredry-aged beef patties not some high class restaurant. You'd have to order on the counter and then get it yourself when the order is ready. That being said, the staff was really friendly and spoke English for those non-Deutsch speakers.
Quality vis-a-vis price is quite good. A burger, fries and drink would cost between 11-16 Euros. Of, course if you do fancy a steak, it is also available. I prefer their BBQ burger with fries and that truffle-mayo dip. I don't quite get why the drinks are so small. Apart from the beers, drinks come in a meager 200ml portions. I'm not entirely sure whether this is something common in Germany or the stores' way of getting you to buy another drink.
Overall, this is a nice place with good burgers, friendly staff and great location.