I stayed here with my parents. Our stay was cosy and comfortable. It was clean and had all the amenities required. Gheddachi was really helpful and quick in responding to my messages.
It is on the ground floor. Though the apartment itself is a bit small, it has a spacious room and a huge double bed for two people. The sofa in the living room can be expanded to a pretty big bed can probably accommodate two people. There were extra blankets under the sofa. There was a TV with cable connection. We found a lots of books and guides to Paris in the living room shelves.
There was a coffee machine with the capsules which was really helpful. The kitchen and bathroom were rather small. The kitchen had a two ring ceramic stove. Dishes, cooking essentials like salt, sugar, oil etc were provided. There was a dishwasher which we did not use.
The Gentilly metro station is a 10 minutes walk. There is a super market near the station that was open even on a Sunday.
It is a really fantastic place to stay, located on a calm street, away from the crowd.
The only small downside is that it is pretty far from the city and it would cost pretty good amount if you have to take a taxi from the city for any reason.