I was there for a gluten free breakfast. This was possible without any problems without a reservation. The rolls were delicious as were the vegan spreads. At the end there was a piece of cake, which was unfortunately quite tasteless. The long waiting times were really annoying. I waited 20 minutes for breakfast and another 15 minutes each for the cake and payment. About half of the places were only occupied. Unfortunately, I was late for the city tour, but fortunately I was still able to take part. So you should plan 1.5 hours for breakfast. Unfortunately you don't sit quite as quietly as expected and there were a lot of wasps.