We stayed for 4 nights, 3 people, and overall enjoyed the place.
The location is great (2 subway lines nearby, 30 minutes walking to the Eiffel Tower), the place was very clean, comfortable beds, kitchen well equipped, supermarket and boulangerie nearby, and communication with the host was smooth.
Some things it's important to be aware of:
1. The apartment is on the ground level facing the street (looks like it was a store before), so almost no windows that can open, and if people talk on the street you hear them clearly (though when we stayed it was very quiet)
2. The 2nd bedroom is on a mezzanine with narrow, spiral stairs going up (you can see them in the photos), so don't count on elderly folks occupying the room, and it's a real challenge to get the suitcase upstairs and back down.
3. The kitchen has no salt, pepper, oil, vinegar, kitchen cloth etc. Host said it's due to Covid policy though in 2 other places we stayed in the same week, kitchen had these essentials