I stayed for 3 months in Frederics place (September-December 2021).
It is located in a very calm neighbourhood in the center of Paris. Supermarkets, delicious french boulangerie/patisserie (i.e. Maison Dakaya) and metro stations (Boucicout, Charles Michel) are within walking distance.
The appartment itself is very well cutted: the two bedrooms, the bathroom and the toilet are separated from the large living room and the very well equipped kitchen by a small entrance area.
The furniture is aged but tasteful and the beds are comfortable. One quickly feels at home.
The only negative points are the thin walls, wherefore one might hear the neighbours.
I can absolutely recommand Frederics place for short- and long-term stays.