This is a charming, comfortable, well-equipped apartment in Paris's 3rd arrondissement/Marais district. It is ideally situated for sightseeing: very close to the National Archives, the Jewish Museum, the Picasso Museum, and the Centre Pompidou, and only 10 minutes from Notre Dame and Sainte Chapelle and 20 minutes from the Louvre. Right around the corner you will find endless bars, restaurants, shops, fruit and vegetable markets, and boulangeries. Yet the apartment is tucked away on a relatively quiet side street, so it is surprisingly serene and peaceful. Inside you will find a comfortable bed and furniture, and a well equipped kitchen with all you need to prepare great meals. Sylvie kindly has lots of supplies available, both in the kitchen and in terms of paper products. She is also very quick to respond to any questions or requests--really an ideal host.
My only word of caution is that warm weather could be an issue, as the apartment is on a narrow street with 3 story apartment buildings and doesn't get a lot of breeze, and there is (as usual in Europe) no air conditioning. We stayed in mid-May and were generally comfortable, with only one day out of five in which it was warmer than we would have liked. However, there would likely be many such days in June through August.