Before I had dinner at Montsouris last night I checked this thread for reviews. The butcher steak with golden mashed potatoes was enjoyed by so many posters it stuck in my mind and narrowly beat out the duck to become my entree order. I am glad it did. The steak was excellent. It arrived on my plate a lovely medium rare with a delicious brown crust encasing the rosy interior. I would also recommend the pate I had to start. By the time I was finished with both orders I was too full to try dessert. I wish it had been otherwise because I very much wanted to sample the chestnut cream.
Though very good food was my expectation, I was pleasantly surprised about the atmosphere. After reading some reviews I was prepared for a dining room as loud as a college bar. Not only was the decibel level reasonable to subdued, but our server exhibited none of the haughty or rude behavior that so many other posters endured. I was seated at 6:30 on a Wednesday night so the crowd was likely not at its zenith, but I stayed until around 8:30. Whatever the explanation the staff was professional and courteous, the atmosphere was pleasant and I look forward to returning.