Mat was a very welcoming host and my boyfriend and I had a really lovely stay in Paris. He gave really clear directions and instructions on how to get into the house, and when we arrived in our room Mat had left lots of guide books and printed out some of his own recommendations of places to go locally, which was very helpful.
The house is incredibly close to a subway station, giving easy access to all the main attractions of Paris.
The room was spacious and quite private (even though you have to walk through his room to get to it). Our one complaint is that the room could do with better lighting, as it's in the basement and there is little natural light.
All in all we had a really nice stay in Paris and Mat is a great host!