Very knowledgeable and considerate staff. They prepare GF food separately, make sure no cross contamination occurs and even showed me the ingredients if the GF bread (no wheat starch!). Food was delicious and I did not have any symptoms (I react to traces). Strongly recommended for celiacs :)
I have eaten here without problems. They were understanding and had a GF-menu. They told me they made the gluten free seperate. I ate the vegetarian burger and dirty fries. I wasn't sick afterwards. A bit on the pricier side though. Around 18 euros for a hamburger (but big and unlimited fries)
There is an allergen menu and several burgers can be made gluten-free. They seemed to be very aware of coeliac as they have a special meat that takes more time to prepare so that they avoid cross-contamination. Food-wise I'd say it's fine, but we went on a Friday night and though we had a reservation we waited 1h30 to eat. One of the waiters was so stressed that he was absolutely rude, the other one was nicer. I would not go back on the weekends though I feel it is safe for coeliacs.