After a very appreciated first visit two years ago...

After a very appreciated first visit two years ago, I am disappointed with my visit in December.
These three stars do not come to sanction a framework, always as pleasant and unique, nor a cuisine, which remains of very good quality, but to deplore a quality of service below what I can expect from a good Parisian restaurant. Arriving relatively early in the room compared to the other people, we were often served with waiting. Judging by the behavior of the waiter, our quality of young adults did not suggest a final grade sufficient to deserve the same attention as the rest of the guests. It is true that we did not have wine or coffee, but the service must be equal regardless of the customers. The receptionist, after having given us our coats, did not even greet us when we left to be able to take care of an arriving group. A simple "goodbye" would have been enough.
This note (very unusual on my part) marks my disappointment with the service. Don't worry, however, if you are over 30, you have planned not to stick to a main dish / dessert. And, anyway, you will eat well.