We stayed in this apartment for a week and really enjoyed our time there! The apartment was clean and well furnished. When we could not find a corkscrew, Celia had one delivered to the door in less than thirty minutes! The building is nice and the street is quiet for Paris. There is phenomenal food nearby (we loved Old Shalimar) and the cafe scene on Rue du Fauborg Saint-Denis made me wish I was in my twenties again. The location near a metro was very convenient and there are a number of grocery stores nearby.
While it didn't bother me, it is worth noting that there are large groups of people that loiter with nothing to do on the street, especially on weekends and there were more than a few prostitutes on the street at night. Again, this didn't bother me, but I know it would bother some people. The neighborhood never felt unsafe.
The neighborhood has a lot of families in it and a great playground that our 14 month-old daughter loved! The pack and play and high chair are in great condition and made it much easier for us to pack for the trip.