Lovely, clean and cozy space in the heart of bustling Bastille. It was the perfect place for a week long visit to Paris, and despite how lively it was outside, we didn't hear any noise from the street. That being said, If you're a light sleeper you may want to bring earplugs, as the walls are pretty thin and we did encounter some noise from other neighbors in the building.
My wife and I felt right at home here though and would recommend Gauthier's place to anyone looking for quiet, but central home base while staying in Paris.