Xavier's place was great to stay in. The loft area is large, spacious, and very comfortable. The kitchen is well equipped, and the whole place has a very interesting and unusual feel as much of it has been done by Xavier himself. The two bedrooms downstairs stayed cool in spite of the very hot weather, which we greatly appreciated as Paris was up to 35°C that week. My only complaint would be that the bedroom curtains did not completely block the light so it might be less comfortable for light sleepers. But the beds and the temperature were great so overall we were very happy.
I would definitely recommend both the place and the host; contact and communication with Xavier was always easy and efficient.