I enjoyed a wonderful month staying in Fabienne's apartment and I cannot recommend it highly enough. The apartment is large and spacious and extremely comfortable for one person. It is bathed in morning light on the south side where the kitchen and bedroom are (overlooking the courtyard) and then again in the afternoon in the lounge and dining room windows. Open them all up and you have a lovely through breeze and really draw the life of Paris down below into the apartment.
The apartment is well appointed, very clean, and is brimming with interesting artwork and decorative pieces (some of which were made by Fabienne's own hand). Almost every day I would discover something I hadn't noticed previously and this made things really interesting and personal. There is a strong wifi signal which makes working from the apartment very easy. The elevator made light work of the stairs up to the 5th floor and meant there is no foot traffic passing by the apartment making noise. At night time I really enjoyed standing on the balcony (what a treat to have a balcony in Paris!) and watching the Eiffel Tower do its little sparkle show every hour.
Directly downstairs is a little épicerie which is open late, across the road is a wonderful bakery that is open Mon-Fri, there are some take away options on the street (none of which I tried so I can't comment on their quality), and nearby there are several options for supermarkets and brasseries. The apartment (like all of Paris) is well serviced by both metro trains and buses and I used a mixture of each most days. Or walk and enjoy the delights of the 15e and 7e arrondissements on foot.
Both before and during my stay Fabienne was extremely responsive and touched base on a number of occasions to see how I was getting on.
This is definitely top of my list of places to stay the next time I'm in Paris for a few weeks' time.