My family and I stayed in Joffrey's apartment the first week of August.
This is a beautiful apartment which should be easily a 5 star property, but for some issues I'll get into below. It is literally steps away from a metro stop with abundant eateries and grocery stores and shopping nearby. It is quite a lively neighborhood yet with the windows closed, the apartment is quite quiet.
Apartment itself is easy to find and was spic and span. It is well laid out with a small, efficient kitchen, a living room, 3 bedrooms, and separate toilet and shower. It has comfortable beds and furniture and is quite pleasant to spend a few hours in.
Biggest issue for us was temperature comfort in the apartment. We had paid extra to get a spacious apartment because we were traveling with our young children, who definitely needed some rest time in the afternoon. Unfortunately with the new-normal August temperatures in Paris, the apartment was an oven in the afternoon and only 1 fan was provided. As is typical for apartments in Paris there was no AC but we felt it was reasonable to have at least a couple of fans. The company managing the apartment did eventually bring us another fan when we requested it but it required a fair amount of assembly, as well as a screwdriver, which we didn't have. We were able to make do by opening all the windows in the morning when it was cooler and then closing all the shutters in the afternoon, but it was definitely uncomfortably hot in the afternoons/early evening.
In addition, we were frustrated that there was no dishwasher detergent or dish soap; we had to purchase this ourselves (cost was reimbursed by host).
All in all, this is a great place; I would have reservations about booking it in high summer unless more cooling apparatus is installed.