Great area to be in. Easy walking distance to the Louvre and Notre Dame. Close to the metro stops so getting around the city is easy.
The apartment area is very small, just as all the other reviews say. One of the smallest bathrooms I have ever been in. However, it is a quaint location and easy for 4 adults. We would have no problem staying there again.
Downside: traffic is very heavy most of the day so plan ahead if you are using a taxi or uber. Travel early if by car.
Very secure building, never had a concern about safety during our stay.