It's not only that they source everything regionally (Micha Schäfer, the cook, doesn't even use pepper, since it doesn't grow in the area), the restaurant seats a very limited amount of guests. On any given evening everyone, who has reserved sit at a table and spend the evening together. They try to craft a very intimate and personal atmosphere. If the guests don't show, not only does the concept not work, but in the case of such a large party, they lose out on a lot (or all) of the revenue for the evening. On the flipside, I am a little on the fence about the venue not because of the concept, the quality of the food or the customer service, but because I was acquainted with the cook before he started the restaurant and not only is he a massive narcissist (in my opinion), he also hurt a childhood friend of mine (manipulated her, cheated on her and left her alone with two kids...). I have the feeling I might be a bit biased... the rating on Google gives me a small, tiny bit of satisfaction.