We stayed for three night with a Family of Six. We felt there was plenty of room to accommodate all of us. It was a great location if you want to stay in what I imagine is an authentic Paris neighborhood without many tourists. Great restaurants and bakeries nearby. We used the Metro to get around town- and there are two stations a few blocks away. Metro was very crowded- be prepared to know where you are going ahead of time to take out some of the stress. The apartment was very nice and had a great bathroom with strong water pressure. Our biggest problem was that we stayed during a heat wave with temperatures in the mid-90's. The apartment did not have AC, and the fans were not always sufficient to keep the unit comfortable. Just bad luck with the weather. With the windows open at night, you can occasionally hear a loud motorcycle or scooter, but generally a quiet street.
The hosts were responsive when we had questions and allowed us to drop off luggage due to an early arrival.