Add me to the Hélène Darroze non-fan club, although I must admit that at those prices I only tried each level once. I was not impressed by the food and the service upstairs was shockingly bad. As for "bad" restaurants, I don't think I've had many actually bad meals in reputable restaurants, but I've had a lot of disappointing ones, in addition to the Darroze places. Violon d'Ingres on the high end, Fouquet's, Bastide Odeon, Thoumieux, Ambassade d'Auvergne, others that don't jump to mind. Maybe I've hit off days, but unfortunately I don't have enough time in Paris to try a disappointing place more than once.