Vinciane and her husband, Frank, were ideal hosts. They were friendly and communicative. Frank was there in person to welcome us and gave us a thorough and entertaining introduction to the historic building, the surrounding area, and recommendations for our visit to Paris. He even made us a reservation for dinner that evening at a charming nearby bistro.
There was bottled water and wine awaiting us when we arrived, a nice surprise after our trek in from CDG. The studio is cozy and immaculately clean; it looks just like the pictures. It is well equipped and has everything you could need thoughtfully laid out in the space -- kitchen with microwave, bar with glassware, espresso machine (with pods) and tea kettle... even a drawer with maps, recommendations and a US/EU power adapter!
In addition to the studio itself being great, its location absolutely cannot be beat. There is so much to do in the neighborhood, and it seems like all of the Paris attractions are within a reasonable walking distance. When we did take the Metro (to Montmatre, or to the airport), it was an easy few minutes walk to the St-Paul stop.