Since I know this place is going to be a rare gem soon, as the first guest, I will try to give as much as I know about it. I will start from the location, then I will talk about the apartment itself and last, but not the least (for sure!) the landlady.
The location: It is mid-Paris. There are three metro stations near to the apartment. The nearest one is Senteir (M3) which is literally in front of the building. You get out of the building and the station is just there, in front of the door! There are two others stations nearby, namely Reaumur-Sebastopol (M3 & M4) and Bonne Nouvelle (M8 & M9). So, not only you can walk to Louvre museum (15 mins) or Notre Dame Church (20 mins), you enjoy being very close to different metro stations which make your commuting very easy. As it is written in the ad, there are a lot of nice high quality restaurants, cafes and bars very close to the apartment. I personally enjoyed living in that district for a short while. Hope I will get another opportunity to get back to this place.
The apartment: the apartment itself is also very nice and interesting at the same time. Everything was clean when I got there and I enjoyed sleeping on a comfortable queen bed. The kitchen is fully equipped with all kind of stuff. You also can find a lot of sculpture made by Marie-Dominique that gives a pleasant feeling to this place. A nice big sofa in front of the a library full of interesting books was my favorite spot for moments of relaxation and a nice coffee.
Marie-Dominique is very nice, thoughtful and caring. Communication with her was easy and fast. I recall that she sent several messages to make sure that I know my way to get from the CDG airport to her place. I will be looking to have an opportunity to meet her!
In summary, I do recommend this place for short and long stay of one or two people.