When we were there, it was quite empty. The quality of the food was above average and the service was good. You are able to pay with card or with cash. There are many dishes with meat, but also a few veggie ones, so everyone will find something there.
Get your tired self from the tourist places in the city center near the Rathouse, go 2 blocks towards Politzei Train Station and you are here. Delicious kebabs, very pleasant service, regional beer. Excellent.