Lulu is a good, responsive host. The apartment is a good size by Paris standards and in a very nice location. The Marais is nearby as is the Metro. There are also nice local bakeries and restaurants. The Ile St Louis is pretty and the apartment was quiet for sleeping.
Some updated furniture (the couch is very worn and not especially clean) and a top sheet on the bed, particularly in Summer, would have made for a more comfortable stay, especially as we stayed for a whole week.