We were staying in Jean-Francois's place for 6 days with my family (5 people) and I can underline only the advantages of the flat because we really didn't notice anything uncomfortable about it. The flat is very spacious and clean, there is everything you need including drier, iron, all the kitchen equipment, etc. Though the main thing is of course the location and the view from the window which looks at Seine River. Near the flat you have all the shops, restaurants, and what is important there not so many tourists around.
So I just want to thank Jean-Francois because thanks to him we has a wonderful stay in Paris!