We had a great stay at Alexis' apartment.
The apartment is not in central Paris but is about a 5 minute walk to a couple different metro stops that will take you into the city center. Also it is near a few local restaurants, cafes, bars, and grocery stores which is convenient.
Alexis was very helpful in getting us settled and helping us with the public transport systems.
His apartment is cute and clean, with everything you need, but it very small (tiny shower) and up 6 flights if stairs (with no elevator).
Overall, we had a good stay, and we liked interacting with Alexis.