I got their specialty dish: filet mignon with foi gras, caramelised onions and truffles on top of a pastry. It truly was the best. The view and service were also top notch! Definitely worth booking!
You have to make a reservation, otherwise you might not eat. Restaurant has only ca. 20 dishes, very pricey: salad ca. 12€, cheapest pasta 16€. Long waiting time. Best espresso ever.