I really enjoyed my stay at Jean-Pierre's apartment. It was clean, functional, the bed was very comfortable and the location can't be beat. You have LINE 5 just down the street and the Metro Bastille is just a few minutes walk where you have other lines (including LINE 1) that can take you many places. The neighborhood is great and you are also just minutes walk from the Marais as well. There is a courtyard with a table and chairs to have morning coffee or some wine later on.
There is some construction work that just started in the flat next door so there may be some noise during the day. I worked in the mornings and went out in the afternoon so it was a little annoying for me BUT most people will be out exploring the city during the day anyway. There is always work going on in a big city.
I would stay here again!