If you are looking for an authentically Parisian experience, this is the place to stay.
My boyfriend and I stayed in Saskia's flat for five days, and had the absolute best time. Not only is her place clean and stylish, but Saskia is also a very thoughtful host. Upon arrival, she sent me many suggestions of places to go that she loved and thought I might enjoy. Saskia's suggestions ranged from food places, to museums, to boutiques, and even her favourite walk to take when it's nice outside.
We were also able to walk everywhere. We didn't take the metro once–it was amazing. Le Louvre is 15-20 minutes away, same with Jardin de Tuileries and the museum of Orsay. It took us 40-45 minutes to get to the Eiffel Tower and about an hour for Sacré-Cœur.
Saskia's flat is central, chic, and she is the most attentive host, what more could you ask for?