I stayed at Quentin's apartment for 5 nights and it was ideal - a great host! He was at home most of the time but I didn't get to spent too much time with him as I was out being a tourist - but it was nice when our paths did cross. He speaks English very impressively and is very well travelled.
The apartment is in a great location both in terms of neighborhood and easy access to metro lines at multiple stations (though in Paris is it easier to walk everywhere!). There is only one bathroom and it is accessed through the bedroom, so communication was key but no issue - Quentin is very easy to live with.
Aldo the dog was one of the best parts of the stay!