This is a great little apartment for one person or a couple. Quite small, but it has everything you need, including more kitchen supplies than I've seen in many full-size Airbnb kitchens, and an actual bathtub! Plus, if you're visiting Paris, hopefully you're mostly out and about and not spending too much time in your Airbnb, so how much space do you need, really?
Mia was very accommodating of my check-in time, and her mother, Nathalie, waited patiently for me as I was delayed getting there from CDG. Nathalie was delightful, and gave me several helpful recommendations for places to eat and museums and galleries to visit. Mia also responded promptly when I had questions, and even had her boyfriend call me to suggest some options when I couldn't get the radiator working properly.
The bed is large and very comfortable, and there's plenty of hot water for a bath (it is a small tank, but there was enough for me). Mia left me some snacks and sparkling water, and there was even a vase of fresh lilies in the room - a beautiful touch.
The neighborhood is excellent - there's plenty of shopping, galleries, and the Picasso Museum right around the corner, but after hours it's quiet, so you'll have no trouble sleeping. In the morning, you may hear some doors closing from other apartments in the building and people walking down the stairs, but I heard absolutely nothing disruptive from elsewhere in the building.
If you have a touch of vertigo, a lot of luggage, or mobility issues, the twisty staircase up to the third floor may make this place unfeasible for you, but it wasn't an issue for me. It's very Parisian!
Overall, I loved this little place and would definitely return and recommend it to others.