Summary: Cramped, over-priced, poor communication, mediocre location. Avoid.
Check-in was a huge pain. We went to the bistro where we were supposed to pick up the key, but the man working there, who did not speak English, had no idea what we were talking about when we showed him the instructions. We called the management company (which is not actually local!), and they were not of much help. After looking around for other possible locations, we returned to the bistro. Luckily, a younger man who spoke English was there, and he gave us the key.
The pictures on the listing look much better than the actual apartment. The apartment is very small, and the situation is made worse by much of the cabinets being occupied by the owner's belongings or food. As a result, we were unable to unpack our things or store any reasonable amount of food in the cupboards.
The management was unresponsive to our problems. The key to the apartment was faulty, and it would take us 5–20 minutes to get the door to unlock each time. We stood in the very hot hallway with our kids while trying and trying to unlock the door. We called and messaged the management company regularly, but they would not fix the problem. They instead just sent us a video showing how to close the door!
The dishes were dirty. There was no soap to wash our hands with when we arrived. The shower head was broken and would not stay up. The water temperature was very inconsistent.
The apartment opens to two noisy courtyards with no privacy. I live in NYC, and the noise here was worse than at home, as I could hear every baby cry, drumming after midnight, music from parties, and loud, drunk conversations word for word. The parties and drunken conversations lasted until 2 or 3 am some nights, even after a neighbor complained to the offenders one night. Plus, an apartment across the courtyard had a bright light that shined directly into the 'master' bedroom.
The listing said that there is an elevator, and there is indeed a tiny one, but it failed to mention that you have to climb a difficult staircase a half flight up to the elevator and another to the apartment. So, people with mobility issues should beware.
One can easily find much better apartments in better locations in Paris for $400/night. This apartment needs some TLC, a responsive management company, and a lower price.