I had the pleasure to stay with Zazie and her husband during 4 days in July this summer.
First of all, the location is brilliant. I could reach most parts of the city by foot (I love walking, but there are also several metro stations very close to the apartment). The room was big, comfortable and clean. July was really hot, but since the windows open in to the back yard and the area is very calm I could sleep with the windows open to not get too hot. The shower and bathroom were small but really nice and had everything I needed, it all worked very well.
Zazie and her husband are very nice hosts, and showed me around the neighborhood - took me to the local farmers market and showed me the way to a Chagall exhibition and so on. This made my stay extra memorable and I can really recommend this as a good place to stay when in Paris for a few days.