The studio is located out of the tourist tracks, but for someone that love and understand Paris, is such a great deal and a hidden gem.
Pros
It is close to: some metro stations and a bus stop, as well as an important boulevard and rues, with all those cafés, pharmacies, bookstores, coiffure... within steps of great dine (really parisian little bistros and serious restaurants with locals all nights), to supermarkets (one of them opens until very late on weekdays, and on Sundays, and has fresh fruits and almost everything you could need), as well as almost in front of an interesting vegan shop (little but well stocked); the Conservatoire National des Arts et Métiers is just a minute distance, and the portes of St-Martin and St-Denis (two Louis XIV era monuments), central Marais (this studio is on a quiet street on Marais Nord, a gentrifying zone) and its boutiques and charming everything is just 5-10 minutes walking. There is a "lavette" (laundry facility) 2 minutes walking. Also, you can experience the "brocante" on Saturdays at the nearby Place du Temple, a good and big flea market. The building is a very quiet place, the street is calm all day and lively at night with the good dines (no noise problem)... the studio has a big window to an interior patio, and a little one for the bathroom for good ventilation (so it is dry and clean, no matter it is a little bathroom).
Emmanuel was attentive and kind.
Cons
Well, it is not a real "con", but better if you like to do some little exercise: 4th floor-no elevator, very parisian.
Last: a really good deal! I will stay again.
Thank you, Emmanuel.