I've been there several times for business trips and have never been disappointed. The fries are excellent, and the accompanying meat is consistently very good. The service is quite fast, and the prices are very reasonable for the quality. My only slight complaint is that the buffet doesn't seem to be homemade!
A very friendly, unpretentious restaurant. We hadn't booked, but they welcomed us warmly. The meal—starter (buffet), main course, and dessert—for 16 euros was very good.