I have only good things to say about this host: Christophe and his wife were incredibly kind, helpful, and accommodating. They made sure that I felt comfortable in their house, and were there to answer any questions I had about the city and public transportation.
The room is spacious and private, with a real bed, a couch, a table, and plenty of closet space. It is also very centrally located. I found that I didn't use up the tickets I bought on arrival because everything was so accessible on foot (and who doesn't enjoy wandering through Paris!).