About the apartment... It is exactly as in the pictures. The bedroom and livingroom are quite bit for a Paris standard. The balcony is amazing. Everything in the apartment works fine and it was really clean... It is in a really quiet neighborhood, with plenty of shops around and a few really good restaurants... It is really close to one of the best things you can visit in Paris, Père Lachaise, and the metro is just one block away, or 5min walking to Place de la Nation, and from there to everywhere.
About the host. Jackie has been extremely helpful, and gave me plenty of advice on where to go or shop. She answered extremely fast every single question I had. She definitely made my stay better ! Thank you !!