The flat is perfectly located in a central&hip area, close to very cool cafés, bars and restaurants (like Chez Jeannette, Hôtel Grand Amour etc.) and very easy to reach (several métro stations around the corner). You can be within minutes in Marais, at Centre Pompidou, at Louvre etc. There was basically no need to take the métro since I could reach everything by foot.
Since it's located on a small street and oriented towards an inner courtyard it is very quiet. I found it very useful to be able to be in the middle of the Parisian city life but at the same time enjoy a bit of silence when getting home.
The flat is very nicely furnished, clean and cozy. You basically feel like home. You have everything you might need (an extremely comfortable bed, a nice sofa, TV, coffee machine, towels) and Julien was always very friendly and helpful with whichever request or question I had.
I am looking forward to coming back to Paris now that I know I found the perfect Airbnb.