Great place to stay while in Paris. It's small, but most places in Paris are! It is perfect for a solo traveler. The touches in the apartment are quite thoughtful, and Eleonora was a wonderful host. She will meet you to give you the keys and the rundown on the apartment, which is quite nice. She'll also provide any recommendations and transportation tips should you need it.
The one thing I will note is that at night, I had to use my phone's light to get into the apartment building and apartment itself. I assumed the building used a motion-activated light, but it didn't, and the floor's hall light went out, so it was pitch black without my phone. I'm sure this was on the building's maintenance staff and not Eleonora. I certainly never felt unsafe, so I didn't mind terribly.
The apartment itself is in an excellent location -- I cannot stress this enough. It's close to a few Metro stations + bus lines. It's also around the corner from an amazing bakery and chocolate shop -- Jaques Genin and Tout Autour du Pain. About a 10 minute walk away, you have Du Pain et des Idées -- another delicious bakery. Basically, everything you'd want to see and do is walkable, but the Metros are nearby and very convenient should you want to use it. I would 100% stay here again should I find myself back in Paris!