Upon arrival, we were greeted by Imen, a young girl that showed us around, gave us the keys and shared the internet password. She was kind and efficient, and the procedure was very simple. We spent a night and then we left for 3 nights. When we came back it was a Friday afternoon and the Internet service was down. Next day, we called Imen and she contacted us with the manager, Mima, who explained the Orange service is usually problematic. She visited us on Sunday to confirm it was a hardware problem and schedule a technician on Monday. We would be on a day trip, so she was on charge of the technician. On Monday afternoon, we realized the router had been taken. later on, when we returned after dinner, the service was reestablished and we found a new router and a bottle of Champagne for the inconvenience.
Regardless the Internet problem, the apartment has some pros and cons.
Pros:
The location is superb, in a very "chic", trendy area. We were 3 blocks away to subway/Metro stations, of different lines; taxis and ubers were easily reachable, as were restaurants, coffee shops and convenient stores.
The decor is nice, mostly white, very cozy.
The windows provided very good isolation, and gave the apartment a seclusion feeling, despite being in the middle of everything.
All neighbours were very quiet.
The curtains provided a nice black-out.
The equipment (washer, dryer, dishwasher, hairdryer) worked perfectly.
There´s plenty of space in the closets.
Hot water comes out quickly in the showers.
Mima´s attentive service deserves a congratulation.

Cons:
The beds were very uncomfortable.
It´s advertised as a 2 bedroom apartment, but actually it´s one bedroom and a studio. The studio has a terrible sofa bed.
Many lights were out when we came. Then Mima changed some of the bulbs, but still some areas are quite dark, like the dinning room.
As advertised, it has no air conditioned. Summers can be very hot in Paris, but we expected to enjoy fresh nights. We were wrong. We had to buy a fan in order to survive.