My two daughters and I stayed at Cedric's place for three nights. I found the self check-in process very convenient as we could decide spontaneously to stay longer in the centre of Paris and didn't have to be at the apartment at any specific time.
The place was very clean and the space for three people was big enough. There is a big double bed in the bedroom and a sofa in the living room.
The metro is about 10 minutes away, so it was easy to get to the city centre, it takes about half an hour.
I would definitely recommend the place.