When I ordered Wiediker Rostbratwurst from the grill I got shoesole sausage that was reheated in the oven. And I also seriously doubt that they were originally cooked on the grill, as from personal experience, they looked and tasted like they were made in a pan.
I like the POP-UP concept of this Bar/Bistro although it is very hip. I think they do a good job with the drinks and it is perfect for a after work drink or a easy lunch.