My two friends and I stayed at B's place for 9 nights in Paris. It's located just minutes walk from La Fourche metro station. I've stayed in this area before and enjoyed how it's not a touristy location, but still have many restaurant and supermarket options. Taking Line 13 metro can be tricky during rush hours as it's always packed. Sometimes we took other metro lines to Place de Clichy station and walked the rest of the way.
The building is well-secured with three doors accessed by codes/key fob before reaching the apartment door. The apartment has pretty fast WIFI, well-equipped kitchen, bathroom, and heating. It was perfect for the three of us, but I believe 4-5 people might be a little difficult and uncomfortable.
The apartment is managed by Alan and he was very communicative and detailed about the check-in and check-out process. The only thing we found a little inconvenient was having only one trash bag and two toilet paper rolls for 9-nights. Other than that, we had a great stay.
Thanks and hope to be back again!