My husband and 8 month old came to stay for 7 nights. It was the perfect place for the three of us. You are very close to Notre Dam and the metro to get to and from the airport and also get around Paris.
Since it is located above bars and restaurants it did get loud next to the living room windows; however once we were ready for bed it was very quiet and the three of us had no issues sleeping.
Something to note, it is owned by a rental property, and not just a host but it was still easy to communicate.
The place was very clean and they were accommodating with getting us a pack and play for our baby. There were plenty of amenities. The bed and pillows were very comfortable.